Fuck it, keep going.

I looked at her tits so I wouldn't have to see her blood, and I tried to block out her pleas for me to stop. I just concentrated on how great fucking her up the ass felt.

I only did it for a few minutes before I shot my load up her butt. Once I did, I came back to my senses. I looked at her face to see if she had enjoyed it, but I saw her crying and in pain. Oh, God, what did I do?!

I got off her and tried to say something. But I couldn't think of anything to say. The visceral lust i'd felt had taken over because I wasn't expecting it. It had even made me anally **** my best friend, just because she asked me not to cum yet.

Shana sat up and pulled a blanket around herself. She put her face in her hands and sobbed loudly.

"Shana...i'm sorry, I don't know what happened...." I tried to think of some way to explain what i'd just done.

"Just go, please..." Her voice was a soft whimper. I got dressed and left.

She didn't invite me back that weekend, and I don't blame her. She wasn't in school on Monday either. Later I found out she'd moved in with her aunt in another town. I knew it was my fault. I've never had sex since.