I pulled off the foreskin of my cock, it was a bit painful. I took a breath and tried to insert it. Damn, it as very tight to enter the sister’s vir...in pussy. Oh god, only the tip of cock has gone in. I pulled out. Again with some more force, I pushed in. About half of my cock went in. I could see my sister shedding tears in pain.But still, she tried to smile seeing my reaction. I said, “I will wait until pain reduces.” After a few seconds, she wiped her eyes and said go on. Guys, take it from. He told me I have a tight pussy, unlike Helen and my mom. He came inside of me, he pulled out, cum started running out down my butt onto the bed. Mac went over to my face and stuck his cock back in my mouth. I think he had some left over cum, I could taste it and I know some of it dribble out. Saturday, mom was home, she didn’t work the weekend. Mom went outside to work on her flower bed. Mac took a risky chance but came in my bedroom. He didn’t even close the door. I was on my bed and he came. For myself, I figured the best thing to do was rejoin my spouse immediately, which I did. I stretched out beside her on my belly, my cock flat and still mostly erect. My spouse poked me."Copping feels, huh?"I grunted."It's not like I was trying to, you know." But you enjoyed it, didn't you?"I felt my cock lurch, even if she couldn't see it. Turned my head to her. Kissed her."She is pretty firm."My spouse kissed me back."And?" She has spiky nipples, too." So, what were you thinking?" That I. Everybody knew about and accepted transferees. No big deal.I'll bet the other David wasn't thinking that ... for him it was the biggest of big deals.I had to stay and talk to two shrinks ... Wendy sat in on one meeting. The morals of MY earth were discussed, disagreed with and we had to 'perform' for the doctor before they let me go. And since, no matter what the morals of my earth were, they still counted with me and I couldn't ... wouldn't ... perform.So I stayed.My comfort zone was violated.