My Daughters Friend

I am a 49 year old man with a daughter who just turned 22. She is in college but I raised her myself. When she was in high school her friends always wanted to come over and I would cook for them after school. Basically I raised a bunch of girls. Last week one of her friends who just moved back home (she graduated college) stopped by for a few drinks. As soon as she saw me she started hugging me and touching me. While my daughter was I. The bathroom this girl just pushed me up against the wall and started kissing me on the lips. She also ran her hand across the front of my pants and gave me an erection. The whole thing just shocked me and aroused me at the same time! Throughout the night she would walk by and gently touch me as she walked by. At one point she grabbed my hand and slid it under her skirt and placed in her panties. She reached back and started tugging on the front of my pants. This was in a room for of people who didn’t see it thank God. I don’t know what to do, but if I sleep with her my daughter will be furious!