Yeah I would get as far away from this situation as possible. That is just pain waiting to hurt you. If she gets pregnant and you end up seeing this man's child grow up, wow. What a world. My well aged mature friend still will not go out with a man I liked decades ago, just because, well just because that's how it is with friends. This woman has no tact. And I speak from the perspective of a woman who didn't have a child for 19 years. I understand her desire but it just might be blinding her. I don't know you, him or her and I'm sure there are some fine altruistic folks out there somewhere that could do this and be happy ever after but it's not in my world. Find some better friends and move on. Good luck.