Sperm-Donor Brother 1

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This story is unapologetically incest-focused. It starts slowly (for me) and builds into incest with the intent to breed. If you can't handle this type of thing, I have other stories you might like instead. (You may, however, want to start reading the story categories and tags a bit more closely before you click ...)

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My sister, Julie, and her partner, Katie, were coming over to my apartment.

Julie had told me that she and Katie had something super serious that they wanted to talk to me about. I had offered to fix them dinner.

I was in the middle of dumping the spaghetti noodles from the pan, into the colander, when the doorbell rang.

"Come in!" I hollered.

The door opened. My sister was holding it. Her girlfriend slipped through the opening and shot me a friendly wave.

I moaned as the movement of her arm caused her generous chest to jiggle. They HAD to be D-cups at least - maybe double-D's. Her silky dark brown hair was bobbed off at her ears. I liked her better with long hair - but this cut showed off her slender neck and made her face look a little fuller. She had a classic hourglass figure that made me think of a fertility goddess totem every time I saw her. I had always thought brown eyes denoted intelligence as well as compassion and my sister's partner had both of these in abundance.

I didn't think it was probably a good idea to admit to my sibling (two years older than me - the same age as Katie - both of them nearing graduation from college) that I had pictured her girlfriend in my mind more than once as I'd masturbated before going to sleep at night.

Julie came in, shut the door behind her, and wrapped her arms around her lover.

My sister - flaxen hair shaved at the sides and cut into a feathered pixie - was nearly flat-chested and had the figure of a beanpole - slender, toned, and largely devoid of curves.

Katie turned her head and offered my sister a kiss. Julie pinched a nipple as their lips met and both of her partner's breasts suddenly had sharp points protruding from the thin fabric that contained those mouth-watering mammaries.

"It smells good, little bro," my sister said.

Katie's focus moved from my sister's face to mine. As the two women's attention settled onto my eyes, I was sure that they knew I was staring at Katie's stiff nipples. Neither of them said a word.

Katie shoved my sister towards a chair.

"Sit," she ordered. "I'll help Alex."

"I don't really need any ...," I began. "Oh!"

I had just dumped the noodles from the colander back into the hot pan. I was still holding the pot in my left hand and the colander in my right. Katie stepped into my personal space, facing me.

"You're not seeing anyone right now, right?" she whispered seductively.

Her arms went around my ribs. She pulled my body against hers and I swear I could feel her stiff nipples pressing into my flesh.

"Katie ...," my sister and I both growled at the same time.

My sister's voice sounded frustrated; mine sounded penitent. Katie's giggle was joyful, naughty, and infectious.

Her lips found mine and I stared around Katie's head into my sister's eyes as her life-partner gave me a kiss that was longer than socially acceptable - and far more serious than a sister-in-law should share with her partner's brother.

I felt a hand grope my crotch and I realized her right arm was no longer wrapped around my body.

"Katie!" Julie growled again.

The kiss ended and the brunette released me, and she retreated a half step.

I found myself breathing hurriedly - to try to make up for the breaths that I had missed while our lips had been pressed against one another.

"Are you sure I can't do anything for - or to - you?" the brunette asked.

"Fuck, Katie ...," I moaned.

"We'll get to that," she promised huskily.

"Come, sit, whore," my sister told her.

"Yes, dear," she replied sweetly.

She gave me a sexy wink, turned, and headed for her chair.

I really, really needed to adjust the tent in the front of my pants - but there was nothing for it. I glanced down to see how obvious the bulge was and caught my sister's eyes returning to mine - after she'd just looked at the same thing.

I hadn't initiated the contact between her lover and me but, somehow, I felt like I should be apologizing. Before I could do that, however, my sister cleared her throat.

"Thanks for fixing dinner," Julie said. "You didn't have to do that."

"I grabbed a bottle of wine," I told her. "Otherwise, there's a two-liter of cola in the fridge. I wasn't sure which you two would prefer."

"Obviously," my sister said (giving her lover the side-eye), "Katie doesn't need any liquid courage. I'll get us each a glass of soda."

"Cool," I replied. "Keep the bottle out. I'm a little thirsty."

My sister went to get the drinks as I started bringing sauce, noodles, breadsticks, and salads to the table.

"How's the job-hunt going?" I asked Katie.

"Good," she replied. "I've got two solid leads. As you know, though, your sister and I will both have education certificates when we graduate as well - so the backup plan is to teach at a high school somewhere."

"Your skills would be wasted there," I told her.

"Thanks, handsome," she replied, giving me a smile. "Julie's would be too. I'd much rather find something for each of us that uses our skills a little more directly."

"I think you'll be fine," I said, "but I'm obviously very curious about what you find the marketplace to be like - especially when I'll be hitting that same job-market in a couple years."

"Your focus on networking should give you an advantage," she replied. "I'm just a web developer."

I waved away her attempt at trying to minimize her skills.

"Lots of places need females in tech jobs - so you'll have a leg up on me there," I replied.

"Obviously, Jules and I would like to find positions at the same place - her doing graphic design and me doing web development," she commented. "Only one of the places that's looking at me right now has a graphic arts department."

I nodded at her.

Julie and I dropped into our chairs at about the same time. She set the bottle of soda at the edge of the table, between us, and I started passing the basket of breadsticks around.

Like every normal human I know, the first thing we did - after pulling a garlicky stick from the basket - was to bite the end off.

"Mmm," Katie moaned. "Where'd you get these?"

I blushed - both at her little moan - and what I knew my answer was.

"He made them," my sister told her, stealing my thunder a little.

"Fuck, bitch!" the brunette gasped at her. "You've been holding out on me!"

Julie snickered and leaned over to give Katie a kiss - which her girlfriend returned. I was torn between watching their lips wrestle and watching Katie's breasts jiggle in her loose-fitting blouse as she bent forward. I ended up doing both.

"Are you ogling my woman's tits?" my sister asked, accusingly.

"He can suck and fuck my tits all he wants - as long as I get more breadsticks," her girlfriend replied.

I must have moaned a little - because both of them looked at me. I quickly attempted to redirect their attention off of me (and my lusts).

"What was it that you two wanted to talk about?" I asked, taking a bite of my salad.

The two women at the table with me looked at each other and stopped chewing their food. I swallowed what was in my mouth and looked back and forth between them.

First nobody talked - then they both tried to talk at the same time - and then my sister's cheeks flushed crimson, and she stared at her salad.

"Your sister and I want to have a baby," Katie said.

"Cool!" I answered. "I'm super happy for you."

My sister cleared her throat - like she was going to try to add something - but then gave up again.

"We've talked it over," Katie said. "We could go to a sperm bank, but I'd really like the baby to have Julie's DNA. You pretty much have the same genes as your sister - plus or minus a chromosome."

"She wants you to do it," my sister said.

"You make it sound like it's not your decision as well," Katie countered.

"I ... We ...," my sister stammered. "Katie ... You know how awkward this is for me."

"I do, lover," Katie told her. "We've been through this. I want you there. I want you to be an active part of the process. I know you feel super awkward about it. I'm not doing this to make you uncomfortable. Honey, I want your DNA in me - not some random stranger's. Alex is the closest we can get. I want his seed, and I don't want to use some syringe. Your brother is a handsome guy. I was bi when we met, and you know that I still like the feeling of a cock exploding inside of me. I'm happy we found each other. I'm in love with you and I want to have your baby. I also kind of miss getting dicked. I want Alex to help us get pregnant - but I want you putting him inside of me. Then, I want you riding my face while he's plowing my cunt. I want to be lapping your jism up as he cums inside of me. I want both of you holding me as you and I become parents with a little help from your brother."

"Little?" I asked.

I had meant that me getting her pregnant wasn't a small task - but - of course - Katie made it sexual.

"Sorry, you fat-cocked man-whore, I didn't mean to insinuate that you had a tiny pecker."

"That's not what I ...," I countered.

"Will you?" my sister asked softly.

"What?" I asked.

"Will you ...?" she asked again.

I gaped at her.

I said, "If you are asking me if I would do anything to help you two, the answer is 'yes'. If you are asking me if I think you two will be terrific parents, the answer is 'yes'. If you are asking me if I'm willing to shove my cock inside of your lover's cunt to make that happen, the answer is 'yes'. If you're asking if I would love to fuck your lover and nut inside of her, the answer is 'yes'. If you're asking if I would be willing to knock your girlfriend up, the answer is 'yes'. If you are asking me if I think your girlfriend is super sexy, the answer is 'yes'. If you're asking if I've jerked off, thinking about her amazing body, the answer is 'yes'. If you're asking if I can pretend the kid's not mine, I'm not sure that's possible."

My sister got out of her chair, stepped over beside me, leaned down, and hugged my neck. Her lips pressed against my cheek. I felt wetness hit my face and - when she stood up - I saw that she was crying.

"I'm sorry," I said.

"Shut up ...," she sobbed, dropping back into her seat. "I love you."

"How soon are we doing this?" Katie asked, grinning broadly.

"Hush, you fat-tittied whore," Julie said.

My sister turned back towards me.

"I'd prefer if the child didn't call you 'daddy'," she said, "but there's no way I could deny you being a part of their life if you can help me and Katie with this."

I thought about what she was asking (and suggesting). I'd be the dad, but I'd only be known as the uncle.

I looked into her eyes.

She spoke again before I could verbalize a response.

"How about this?" she offered. "When they turn 18, we'll tell them who their biological father is."

"That's fine," I told her. "We can talk about it. I'd wanted a larger claim on them, obviously, but I can see that it would create some issues. I'm okay with being Uncle Alex."

"I promise that you'll be there for everything," my sister assured me.

"I ... yeah ... It's fine," I said. "Let's eat - while it's halfway warm."

I had just started on my spaghetti when things got awkward again.

"How many times have you jerked off, thinking about my girlfriend?" my sister asked.

I had begun to hope they had missed that part. I glanced from her to Katie - who appeared to be keen to hear my response as well.

"Uh ...," I stammered. "Once or twice."

"How soon can we start trying?" Katie asked.

"I sucked you off before we came," my sister snarled at her.

"I know ...," Katie replied. "I just ..."

"You are such a nympho ...," my sister complained. "Can we finish dinner before we discuss this?"

Katie nodded - and then began eating her food at twice the speed that she had been before.

"You're going to make yourself sick," my sister warned.

Katie finished her pasta and grabbed another breadstick to begin sopping up her leftover sauce. She moaned again as she chewed the next bite.

She looked at me and - after swallowing down what was in her mouth - offered more praise.

"If I didn't want your sperm painting my womb so badly," she said, "I would suck your dick. These breadsticks are that amazing."

"I picked up some tricks when I was working at the pizza place," I told her.

"If you'll just let me play voyeur," my sister told her, "I'll bribe my brother to make you some of his sausage bread. It's like a calzone without sauce. It's super yummy."

"We've talked about this," Katie told her.

"About what?" I asked.

My sister sighed heavily and said, "She wants a cock so badly, but she doesn't want to cheat on me. She's worried that it will feel like she's cheating if I just let you two screw - even if I watch. She wants ... Ugh! She wants me to hold your penis and put it inside of her. She's been very specific - and graphic - as she's told me what she wants - and it just feels icky to me."

"I'm okay with you touching my penis," I told my sister.

"I'd expect no less from a pervert like you," she spat back.

"I'm not saying I want my sister to kiss me while she strokes my cock," I said, looking into her eyes. "I'm saying that - as I've already told you - I've lusted for your girl and maybe she's right. Maybe the two of us need you to actively participate so that I don't feel like I'm going behind your back to have sex with your lover."

"See?!" Katie exclaimed.

My sister sighed again.

"This ... you guys are just too sexually frustrated. You have my permission to fuck. You have my permission to fall in love with Katie and fuck her whether I know about it or not and I promise not to be pissed."

I shook my head at her.

"Would you give anybody else that permission?" I asked.

"No," she said easily.

"Then you don't truly mean it for me," I replied. "You're just hung up on touching my body because you think that, somehow, it's like you and I are having sex."

"I don't touch other people's cocks ...," she argued.

"I get that," I replied, "but you also don't ask other men to slide their cocks into your woman's cunt."

Julie sighed again - looking back and forth between her lover and me.

We finished eating and then the two of them helped me put everything away.

We talked about watching a movie together, but my sister was still acclimating to the whole idea that she was going to (eventually) be responsible for guiding my penis into her girlfriend's pussy. I walked them to the door and gave them each hugs and kisses. My sister's kiss was on the cheek. Katie first kissed my sister on the lips and then turned and kissed my lips as well.

"You can dream about me - or us," Katie told me, "but I don't want you to touch yourself."

"Are you kidding me?" I complained.

"I promise I'll abstain as well," she countered.

I stared into the beautiful woman's eyes.

"She must be serious," my sister said, "she usually makes me get her off at least once a day."

"You already did, I thought," I argued.

"True," she replied, "but she always wants it again before we go to sleep."

I sighed heavily - and then realized that I sounded just like my sister had - earlier in the evening.

"Fine," I finally agreed.

Katie's hand reached for my groin, and I caught her wrist.

"Not helping ...," I snarled.

"Ah," she said. "Right."

The two of them left and I checked through the kitchen, dining area, and front room - looking for anything that needed to be put away before I headed to bed.

I dropped onto the couch and thought about what I had agreed to do.

My cock began to swell, the longer I thought about sliding my penis into Katie's snatch. My mind began to wonder about how tight she would be. My pants grew tighter and tighter, and I realized that I wasn't doing myself any favors.

I stopped in the bathroom, took care of the necessities, and tumbled into bed. There, I began the same downward cyclone - heading into the abyss once more.

Normally, I would simply jerk off and fall right asleep. However, I had promised Katie that I wouldn't masturbate. I tossed and turned for an hour - trying not to think about my sister's lover's body - before exhaustion finally overwhelmed my brain and I was able to succumb to the darkness.

~~~

I had finished my morning classes and was on the way to my part-time job when I got a text message. Seeing that it was from Katie, I stepped off of the sidewalk and checked it. It was a picture of a very rigid nipple. Actually, it was part of a breast, an areola that was sprinkled with little goosebumps, and a very stiff nipple - but my mouth had begun watering almost immediately and the nipple was all that my mind would focus on. I swear the damned thing was imprinted into the backs of my retinas. Almost immediately, a second picture arrived. It was a shaved vulva and enough of a shot of the panties being pulled out to snap the picture that I could see the circle of wetness that aligned with the bottom of her slit. I groaned and started to send a reply with I received a text message that said, "Remember: No touching yourself."

I sent back a picture of a hand with the middle finger extended. She replied with a peach and an eggplant - the emoji version of a pussy and a penis - and the connotation of sexual intercourse. I fired off a text to my sister, telling her what her girlfriend was doing - and telling her to get her bitch on a leash or I was blocking the number. I resumed my walk. Five minutes later, Katie sent me a crying emoji. Thankfully, she left me alone for the rest of the day.

Work was tedious - as usual. At break time, I looked at the two pictures Katie had sent me and contemplated jerking off in the restroom. I decided that I could make it a little longer. The rest of the afternoon ground along at glacier speeds but it was finally time to go home.

I was walking to my car, after work, when Julie sent me a text, informing me that Katie was desperate to begin trying. She told me that they were coming over - and that they were bringing Chinese. I gave her my order, warning her that I expected at least two crab rangoons on the side.

My apartment was only about a mile from work - and about a half-mile from the building where the majority of my classes met. I had my own vehicle but I tried not to drive it unless I had to. It wasn't that I was saving money on gasoline; it was more because campus parking was atrocious - and - as a student - my options were limited. Parking in the closest space available, it would have actually been a longer walk (to both classes and work) than it was for me to walk from home.

Mom lived an hour away. Dad had fought with mom over how to deal with my sister after Julie had come out of the closet. He'd disappeared soon after. It probably wasn't nice to say, but none of us really missed him. Mom might have - but she never said anything.

The doorbell rang and I went to answer it. My sister and Katie were waiting on the front step. Julie shoulder-checked me on her way by; Katie leaned in for a kiss. She had bags in her hands but she made sure that she pressed her whole front against my whole front while her lips danced with mine.

"I wanna suck your cock so badly," she whispered, "but your sister really wants a baby - so I guess you'll just have to blow your load in my womb."

"Katie ...," Julie snarled.

I groaned as she stepped past me. I pulled the door shut and followed them to the kitchen.

"Here's what I'm thinking," my sister said.