A close family member is 8 1/2 months pregnant with a baby and doesn't know for sure who the father is but after doing the math realized it's definitely not her boyfriends baby. They had gotten in an argument at one point and she slept with an ex-boyfriend, then when she got pregnant, decided to raise it with the new boyfriend. She admitted to him it could be the ex-boyfriends baby but was confused about which one she was with in which month. Fast forward to now - the past 8 months she's been back and forth with the new boyfriend, fighting one week and then saying they're getting married the next. I offered to genuinely help out with the baby and take on the role of the father (I'm female) because I have a stable life, career, home, marriage, etc and can afford to assist emotionally and financially. However, every time I've told her it's going to be okay and that I'll be there for her, she snaps back with wanting me to buy her an engagement ring - she's joking, but it's offensive because I'm opening my home and heart to help and she only seems to care about a ring on her finger, even if she thinks it's funny.
She's planning to have the new boyfriend sign the birth certificate because he offered to be the baby's dad. He's not the same race as the baby so it will be obvious in the hospital that he's not the biological dad. They also aren't planning to get married soon because they're so back and forth every few days.
My question is this: If he signs the birth certificate in the hospital in Oklahoma, is he legally obligated to stay the father even if he can prove through paternity later it's not his? (He knows it's not his now) Also, what if the biological father wants custodial rights to the child? She brags that she lives in a mother state and if she wants to screw over the dads in her life she can and the state will side with her. (she has 2 kids with 2 other fathers previously) I researched online myself and everything I've found says the new boyfriend shouldn't sign the birth certificate, but get an AOP (acknowledgement of paternity) and adopt the baby later. However, I've read that the biological father should have rights to the baby even though she doesn't want to be with him. She thinks she's in the right and called me crazy for not supporting her decision to lie. She insists it's what the new boyfriend wants and refuses to hear me out. Am I over-reacting to not wanting her to commit paternity fraud? She claims this is totally normal where she lives and women do this sort of thing all the time. My concern is for the well-being of the child and this seems like a horrible idea. My attorney can't talk until tomorrow so I wanted to ask on the forums before paying him for a phone call. Any information or opinions on this matter are greatly appreciated. Thanks in advance.