Is it normal that i tricked my friend into a relationship with me?

So one night im having a party and my friend is there, now ive always loved her but from a far. We all got really drunk. Well everyone leaves, I found her passed out in guest room, i went to wake her and realized she was naked, so i had sex with her then went to bed. She got pregnant, and her religious parents through her out, so i offered for her to move into my apartment, i ended up taken care of her and told her i would help her out. She had the baby and i helped her financially and help take care of the child. She fell in love with me, and now were in engaged. She still has no idea but she wants to just let our little girl believe im her dad. So is this okay, i mean we are all really happy