I Fucked One Of My Daughter's Friends

I am a widower who has raised a beautiful, educated young woman. She is about to be a senior in high school and I couldn't be prouder.
My wife passed away 3 years ago and I haven't remarried. It has been hard, but we have taken it one day at a time.

Last month my daughter had a sleep over with 2 of her friends.

I went to sleep that night and woke up to someone crawling underneath my comforter. I felt them undoing the front of my boxers and I became instantly hard before I felt a warm mouth wrap around my head and start bobbing up and down. I could feel that she was wearing only a t-shirt (her nipples were hard) and panties. She was already wet.
It was dark, so I couldn't see who it was.
In the moment, I wasn't thinking. I pulled her up and she immediately sat down on me, guiding my dick inside her.
My eyes rolled into the back of my head. It was the tightest pussy I've ever felt.

I pulled her down, rolled on top of her, put her knees above her head, and proceeded to fuck the shit out of her. She started moaning and I just put a hand over her mouth. I just listened to her quiet moans, her pussy squelching as she rammed against me while I plowed into her.
She started shaking and I came immediately inside her after that, uncovering her mouth to kiss her.
She sucked on my tongue and I continued to fuck my cum into her.

It was the most intense pleasure pain I've ever felt. I made myself keep fucking her and ended up cumming again. Barely anything came out, but her pussy was like a vice that I never wanted to leave. We rolled again with her on top of me. She crawled up, pressing her face against my neck and gently licked me while we both caught our breath.
We just held each other with her arms tightly around my neck and her legs on my sides. I fell asleep feeling my cum dripping out of her onto my stomach.

That morning I woke up to my door shutting.

I made breakfast for us all and I have no idea which of those girls I fucked. They are both very attractive, but they have similar body shaped and curly hair. Both went home later that day. Neither came up and said anything to me. To tell you the truth, I'm very scared I may have just gotten one of them pregnant.