Heather got up, as I walked over to her. She leaned up, and we kissed. It felt weird at first, but I began to ease up. My sister stopped for a moment, and rubbed my chest. "You okay, baby?" she whispered.
"Yeah. This-I like this."
She took her shirt off, revealing a black silk bra, and my cock very quickly expanded to full size. Heather had put on a few pounds, but that didn't matter; she still looked beautiful to me. She then slid off her jeans, revealing a pair of plain black panties. Following her lead, I took my shirt off. I'm a little paunchy myself, but I don't think this bothers her. We then wrapped our arms around each other, and continued kissing, this time more lustfully, with our tongues writhing together. My hands found their way down to her big, pillowy butt-cheeks, and I started squeezing them roughly. This was met with a moan of approval from my sister.
My sister then fell back, taking me with her. On hitting the bed, I started kissing down her neck, towards her large breasts. It was obvious what I wanted, so my sister reached under her, unhooked her bra, then took it off. I was so excited to see those babies with their deep brown, saucer sized aureole, my cock did an extra jump. I immediately started licking and sucking on her nipples, making them nice and hard, and squeezing her tits the same way I did her ass. I could hear her breathing hard and moaning. I gave those tits that had been stuck in my brain for so many years all the attention they so richly deserved.
After an extended time spent on her dirty pillows, I continued down, kissing my way down her sexy Buddha belly.
"Gonna eat me out, baby?"
"Yeah." Heather slid off her panties. She was still keeping the same grooming habits, but, again, thanks to her, I grew to like my pussies hairy. When I used to watch my sister, I always hoped to get a good look at her pussy, but no such luck. Now, finally, it was right in front of me, I felt compelled to just look at it. Sort of take it all in. I ran my fingers up either side, and Heather twitched slightly. I held open her pussy-lips, and saw how pink it was inside, then I rubbed my fingers all over, which made her twitch even more. My sister was extremely wet, and I licked her juices off my fingers, then I leaned in, and started eating my sister's pussy. As my tongue probed deeper and deeper inside her, and I rubbed her clitoris with my thumb, I could tell my sister liked it. She wasn't so much vocal, as she mostly breathed hard, with the occasional little whine or moan, which I kind of found sexier.
My sister's breathing sped up, and her pussy just got juicier and juicier. I could tell she was about to orgasm, when her breathing suddenly got very fast, and then she finally let out a long, loud moan. She then sat up, and we kissed some more. "Jeez, I can taste myself on your lips."
Heather told me to stand up. She kissed around my navel, as she undid my pants, then slid them down. She then slid down my boxers, finally freeing my throbbing cock. "Jesus, Alex. No wonder you wear such baggy pants." She smiled up at me, then the next thing I knew, she had her lips wrapped around my cock, licking and sucking on my swollen head, and stroking my shaft. She moved her mouth down it, then slowly pulled back up, sucking all the time. I haven't had that many blowjobs, but this one was the best I'd had by far. If you've ever wondered if it's true that big girls give the best head, well, in my sister's case, it is. Heather started to speed up, but I stopped her. "Wait."
Heather sensed what I had in mind, and scooted back on the bed, and lay back. I crawled on, and got on top of her, then I pressed my cock against her pussy, then pushed it in. My sister's hot, wet pussy enveloped my cock, and grabbed onto it tightly. "Oh, God, Alex," my sister whispered, "Fuck me." I slowly started to slide my cock in and out of her, causing her to close her eyes and tilt her head back. "Fffuck." Her tits swayed slightly as I went, and the bed started to creak. I went faster, and she grabbed her tits, and squeezed them. Her nipples were so hard, her aureole had shriveled up to about half their size. "God, your cock feels so good inside me, Alex."
At one point, we switched positions, and she was riding me. Her tits were bouncing hard, now. As she rode me faster and harder, they started to bounce so much, they looked like they hurt, so I reached up and grabbed them. A couple of times in this position, she let out a cry that suggested she was cumming.
We eventually returned to the missionary position, but this time sideways on the bed. "Oh, baby, yes! Harderrrr!" I felt like I was gonna cum, so I asked her where she wanted it. "Wherever you want it." I told her to sit up, and she instinctively held her tits up. It only took a few jerks before I shot off the biggest load I'd ever shot. The orgasm was so intense, I fell backwards on the bed. I looked up, and saw my sister massaging my cum into her large breasts, especially her nipples, and licking it off her nipples. "Jeez, sure you got it all?" She smirked, then crawled over to me. "Baby brother... " She licked and sucked the rest of the cum off the head of my dick, then kissed her way up my chest. Coming back up, she kissed me passionately.
"So, we ever gonna do that again?"
"Any time you want. Just call me."
Me and my sister have had sex on a number of occasions since then. When we first did it, I thought for sure it would get... weird. But, if anything, it's brought us closer together. We have a relationship not unlike any other brother and sister, except once in a while we get together and, well, do it. My sister has even told me a couple of times that I'm an incredible lover, that she's never been with someone who knows her body like I do. Both times I blushed and laughed nervously, which I tend to do when someone flatters me like that, and then she laughs, tells me I'm cute, and gives me a peck on the cheek.