I've been living with a foster family since I was 14. I have a foster brother a couple years older than me. He went away to college out of state. He was always nice to me and when I first came to stay at this house I thought he was really hot. He was a foster kid, too, so I didn't feel wrong about it, but he'd been with the family since he was younger than I. He's a decent guy and everything. Well, before he went away to college I was kind of this nerdy, shy girl. He always told me I was a hottie and I just needed to let it out, but I still had I guess what you'd call baby fat so I always wore baggy clothes and what-not. I never really liked my body much, aside from my boobs, because every girl, whether they admit it or not, likes having nice boobs. I was just awkward. But during the time he was gone my body changed, mainly I lost the baby fat and grew hips. I became comfortable with myself by standing naked in front of a mirror for long periods of time and when I was home alone I'd walk around naked, especially in the day time, or sunbath nude by the pool. Not to sound full of myself but after a while I changed up my clothes to be more flattering to my figure and I know I was turning heads. But then I started down a bad path, hanging out with the wrong people and getting high... being the typical foster child. I did a lot of stupid things but no matter how many guys hit on me I never hooked up with any of them. I don't know why, it just never interested me. And then he came home for summer. I was sunbathing (clothed) and I heard him say my name, stunned. The second I heard him I got excited and spun around and jumped from the deck chair and ran over to give him a hug, briefly forgetting I was in my bikini. He hugged me tightly and it felt like home. He pushed me back a little and looked me over and said "Wow! I'm so glad you finally came out of your shell. I told you you were a hottie!" For the first time in a while I was embarrassed, but at the same time liked him looking at me. We spent the rest of the day and night, and the next few catching up. We smoked a little here and there and it was just really great hanging out with him again. He was home about 2 weeks before I just couldn't take it anymore. Our foster parents were gone for the weekend and we were sharing a joint in my room when I finally leaned over and kissed him. It felt so great to have his lips on mine. He didn't resist either, but when I broke away he told "We can't do this." I told him it was okay, that I wanted to, but he just told me I was too young, I was his sister, etc. I put my hand on his thing, really close to his crotch, and could tell he was already hard and I knew he was just trying to be a decent guy. When I leaned in closer to him again and he didn't pull away I knew he wanted it, too. I told him we weren't blood and that I wanted him to be my first, and I kissed him again. When he pulled off my shirt, it was such a great feeling. He was sitting on my bed, leaning against the wall, and I was straddling him, sitting a little ways back from him while he marveled at my breasts in the bra I was wearing. Yeah, remember when I said I had awesome boobs? In that moment, anything we were before was gone and we were lovers. I'm not ashamed to admit I'm in love with him. He gently caressed my chest, my breasts, and I let him. I pulled off his shirt and touched his chest as well. I was so turned on! I slowly glided my hand to his pants and undid them, pulling down the zipper. I reached in and pulled his member out and accidentally moaned a little when I finally saw it. It wasn't huge or anything... it was long and thick enough I could just get my hand around it, but it was his and now it was mine. I gave it a couple strokes before I went down, slowly kissing down his chest and then kissing around it before taking it in my mouth, the first time I've ever done anything sexual. I wanted him to finish so I could swallow him, but he stopped me flipped me over, removing my pants so he could do the same. I was so embarrassed because I was so turned on my panties were soaked through. He didn't say anything and when his lips touched me down there, I was in heaven. After a while he returned to me and kissed me and I loved tasting myself on his mouth. I kissed and licked every part of his mouth. And then he entered me. It felt so good I actually cried out, my arms and legs wrapped around him tightly for fear of letting go. Every thrust was so intense, how completely he filled me, I never wanted him to stop. After a few minutes, though, I pushed him on his back and took top, his hands on my hips, as I slowly worked them on him. It wasn't long before his body tightened and he was holding my hips tightly as I worked faster and with a loud moan I knew he was cumming. Right before he did, though, his member swelled inside me to such a size it triggered my own orgasm and I was riding him hard and screaming in ecstasy at the same time. He came so much inside me and I almost started crying at how incredible it felt. We laid there, me on top of him, for several minutes and at some point we just fell asleep because we awoke in my bed a few hours later, still naked, most of his ejaculate that was inside me having run down my leg onto the bed. We had sex often, sneaking around when we had to, and I finally got to swallow him the next day and often after that, but now I'm several months pregnant. I don't know when exactly it happened, but I like to think it was that first time. I told my foster family that it was some random guy I slept with over the summer to protect him, but he wants to be a decent guy and tell them it's him, but I won't let him. I love him too much to let him ruin his life. Mine was already fucked up, and our baby is the greatest thing ever to happen to me and I love our child as much as I do him.