He Did It And I Did Nothing

I am 18, nice enough looking, a bit chubby body, but not bad I guess. I do have really small boobs though, almost nothing. I have had sex before my current boyfriend, I used my mouth on dates with 4 guys, two of them about 4 times, one over the course of a year. I used my hand on them also, as well as one other older man I got into a situation with and just did it to get out of there. The guy I sucked for a year was also my first to fuck me. I let one other guys do it also while I was dating him, yes I cheated and got fucked for my trouble. My current boyfriend is very nice to me, he does bring it up to me though several times that he wishes he and I could have had my first time together.

Last weekend he and I were doing it and he pulled out, kissing me all over, going down on me. He said he wanted things to last longer, and wanted to massage me. He had me roll over on my belly, and it was feeling great. Then he got on top of me, rubbing vaseline on my butthole. He was whispering hot into my ear which he knows turns me on, he didn't ask or say anything about buttsex but he just started slowly pushing it into my butt. I grimaced a bit and he stopped, just asking if I needed it slower. I said yes. It honestly never occurred to me to say not to do that. Soon, slowly I had his length all the way inside me. He says it's 7 inches, but I think it's 6 at most but it didn't feel good. He was whispering how good it felt how hot it was and how I was so special to let him do it to me this way. None of his other girlfriends would let him do it but I was so great. He started moving in and out, slowly and I was still grimacing in pain but groaning on his inward strokes. It took him probably 20 minutes before he finally jabbed it into me over and over again and I could feel his sperm coming out. Leaving it in me he just kept repeating how hot I was and hot it was that I could take it. He knew I'd never had anal with anyone. He didn't ask or anything just did it.

Over the last few days he's only done it in my vagina once the other 4 times were in my butt. I just lay there and take it, it does nothing for me. This is what he wants, to put his cock and cum inside my butthole. My sister told me I don't have to take anything I don't want to do but I feel the damage is already done, so why not let him? He really likes it and me for doing it.