PLEASE! I NEED ADVICE! Please help.

I cheated on my wife with my daughter’s 19yo friend. She woke me up in the morning last Thursday and already had me hard. She was sucking on my ear and had me in her hand with her leg over me. She was almost completely naked and took me by surprise. I Don’t know what the f*** I was thinking, but my primal instincts took over and I went crazy on her. I hadn’t had s** for two months before that and I don’t remember ever doing it like that before in my life. It was almost predatory.

Even though my s** life is damn near nonexistent now, I am married and have a beautiful daughter who will graduate this year and go to college. WTF was I thinking!

1: First and foremost, I am married, am 35 years old, and have a daughter her age.
2: I thought she had a boyfriend.
3: WTF.
4: I think my daughter found out somehow because they are acting differently towards each other, and she’s been really short with me. (My daughter).

What should I do. Ever since that happened she’s been coming over whenever she feels like it, and doesn’t bother to knock. She acts like she owns the place, and I’m too ashamed to say anything about it. When my wife and daughter aren’t around she constantly reminds me of what we did by showing me her underwear and touching me inappropriately. She has been becoming bolder, just walking right up to me and kissing me like she doesn’t even care. I know she’s probably going to try it again somehow, and if she tries to seduce me again, I don’t think I’ll be able to stop her for a few reasons. I’m afraid she’ll tell if I don’t, and what the f*** does it matter now anyway, I’ve already done it. If my wife knows she hasn’t said anything about it. But I worry that she’s gonna find out. This girl has no boundaries and is getting bolder every day of the week. Wearing skimpier clothes, and doing more to tease me, testing how much she can get away with.

Also, her father is a longtime friend of mine, we’ve know each other for years, and I don’t want him to know either. I know he raised her differently, so what the f***. Sometimes she even tries to take over the house. Like the other evening my daughter wanted to watch something on TV, and she (her friend) didn’t. She basically manipulated me into making them watch what she wanted to. My daughter went to her room and looked at me like WTF, and was almost crying. I couldn’t even go talk to her, because what was I gonna say. “I’m sorry sweetheart, but I can’t say no to your s*** friend because she has blackmail on me.”

I am loosing control of my life over this girl, and don’t know what to do.

5: I love my wife, and feel like s*** over this. What the flying f*** was I thinking?
6: I just remembered there was no condom, and I ended up c****** inside her (she was on top). WTF. FML.
7. Why is my daughter hanging around with a girl like that? Not that I can say anything now, because I lost my right to be an example.
8. I don’t f****** know what to put here, but I feel like I should. I don’t want to lose my wife, or my daughter over this ridiculous s***.

Please help me someone. Anyone. What should I do? I feel like I’m already in too deep to save myself now, but I still love my family more than anything. I don’t want them to find out about what I did. I’m afraid they will think less of me.