My sister, Becky, and I spent an unbelievable week together. We slept naked every night. I got up every morning and took a shower with her, then I'd go to the kitchen, still naked of course, and make her coffee. She'd come out when she was dressed and if she had time would give me a blow job. What a way to start the day.
She was true to her word. We never fucked. I was getting anxious to try but didn't even hint I wanted to for fear of messing up the good thing I'd found myself in. The closest we came was on Thursday night. We were in bed and just going at it. I had her on her back, sucking her nipples and fingering her pussy. Becky was cumming like crazy. She pulled my head up so she could kiss me and my cock got stuck between her legs. If I'd moved my hips the right way I'm sure it would have gone in her. Instead I just backed off and said, "Oops." She just smiled and said it was ok.
Friday night we went out again. There wasn't a drive in near by so we just went to the same theater as before. Becky wore another hot dress, and this time I watched her put it on so I knew she didn't have panties on under it. That let me finger her to three or four cums during the show. She was very hot by the time we got home.
We had pizza and beer again but as soon as we'd eaten we went to bed. It was only 11:00 but Becky had to work in the morning. I did too. Still we were both too horny to just go to sleep.
We started kissing and groping each other's naked bodies. We ended up sixty-nining with me laying on the bed and Becky smashing her bald pussy in my face while sucking on my big hard cock. We both had massive climaxes. Becky swallowed my entire load.
After that Becky turned around so we could kiss and cuddle. She was laying on me with her legs wrapped around my hips. The kissing got pretty intense and I started to get hard again. As my cock got bigger it started to nudge against her pussy. I knew that was forbidden territory but I couldn't move or say anything. Becky had to have felt it but she didn't move.
Slowly I felt the head of my cock push into her pussy. Still, my sister didn't move. 'Was she actually going to fuck me?' I wondered. I was afraid she'd come to her senses and be mad at me so I tried to pull back by flexing my hips. My cock head popped back out and I breathed a sigh of relief. The last thing I wanted to do was screw up our arrangement.
We kept kissing and kissing. Eventually it got harder and harder to hold my hips back. I had to relax but I was scared I'd poke back into Becky's pussy. She still had her tongue down my throat preventing me from speaking. My hips just started to slip, from exhaustion I guess. My cock head slipped back in.
This time an inch or so of the shaft followed it. God, it felt great but I was so scared I couldn't enjoy it. I rested like that for a second and then with a great effort was able to pull back out. Still no reaction from Becky. This time I couldn't hold it very long at all. I tried to push Becky off but I couldn't get the leverage I needed. Suddenly my strength gave out and my cock drove deep into my sister's pussy.
"Oh!" she cried, lifting her head up.
"Sorry!" I almost screamed, "I've been trying to pull back but I just can't hold it."
"I know," she said quietly. "We have to stop."
But Becky didn't move. My cock was still half way up her hot pussy. I just laid there afraid to move. Finally she rolled off me and my cock pulled out.
"Drake," she said, "we have to be more careful. I almost..."
"Yeah, I know," I told her, "me too."
"We can't."
"I know."
It was late so we just cuddled together and went to sleep. The next morning we showered and left for work at about the same time. I worked in the main library and on Saturday's I worked from 9:00 to 5:30. Becky was supposed to work from 9:00 to 1:00 and then head home for the rest of weekend.
When I got off work I didn't feel like rushing home to what I expected would be an empty apartment. I normally could be home in ten or fifteen minutes but it was almost 6:10 when I turned the corner on our apartment building and saw my sister's car still parked in her usual place. I parked next to her and rushed upstairs.
Becky was standing in the kitchen talking to her boyfriend, Doug, on the phone. I could hear only half the conversation.
"Do you think I should risk driving home on the spare?... Ok, well, then I guess I'll stay here tonight... I'll miss you too... I will. I'm sure he'll be glad to... Love you too. Bye"
"Did you have a flat," I asked her when she hung up.
"No," she said as her face broke into a smile, "but I didn't feel like driving four hours just so I could turn around tomorrow and drive back. Besides, I thought maybe you'd like to go out again."
"Sure," I said a bit too eagerly, "I mean, I haven't gotten out much since I got here."
"You know this will be our third date," she said, "Does that mean we're going steady?"
"Ah, I..." I stammered. I hadn't tried to think about our 'arrangement' dating. That would make Becky my girlfriend. I could not get over the fact that the woman in my bed every night was my sister. "It's just hard to think about things in those terms," I said.
"Ok," she smiled, "I won't tease you. It's just that I'm having such a good time. It's like I've finally gone away to school. I probably shouldn't think about you like that, but I've never had a boyfriend like this."
"What about Doug?" I asked getting more nervous but also more fascinated to learn what she was thinking and feeling.
"Well, I've been with Doug since my first year of high school," Becky said. "I missed out on teenage dating and gave up on going to college to be with him."
I didn't know what to say. Having her talk about her and Doug's relationship was too freaky for me to take. Becky could see how uncomfortable I was so she went on.
"That's why we can't go all the way, Drake," she told me, "I don't want to cheat on him and if we can keep at least that boundary between us I can convince myself that this is just some innocent fun."
"Ok, sis," I said, "I've accepted the ground rules. In that context we're going steady. I've had a great time."
"Me too," she said, as I finally came over to her and kissed her. We just stood there in the kitchen kissing for the longest time. God, it felt good to have her in my arms again. I'd never thought about it before but Becky smelled good, a mix of her shampoo, perfume and her natural scents. I was intoxicated everytime we got this close.
"Now," I said when we finally stopped, "where do you want to go?"