I think you need to come clean with your friend. I know it’s scary, but do you have any idea how soul-crushed he’ll be when he finds out what kind of woman he’s with, that his kid might not be his - or yours! - and you, his friend, just turned the other way and let him live in a house of cards raising possibly your kid?

Do the right thing and come clean. I really don’t think you could be prosecuted for rape. She doesn’t remember (or lied and said that) and there’s no evidence. Even if the baby is yours it’s not indicative of rape, just sex.