<human>: Okay. Lots of info to put out there. Ryan(29), my(24) SO, obviously has had other women in past. Yesterday he got a bunch of texts from his ex(25) saying that he's the father of her daughter... He has not seen her or anything since she cheated on him. When she had gotten pregnant, she told him that it was definitely not his and she had been cheating on him for a while now. She packed up her bags, left the state and got married to the father of the baby. He calculated her due date and had determined that there was no way the baby could be his. He was out of town around the time of the baby being conceived. 

Now she's texting him and emailing him telling him he needs to step up and be a father... I'm sitting in the background like WTF?! We've been together for a year and a half and I knew about this situation when the baby was born. He showed me her picture and questioned if she looked like him.

Anyways, Ryan has just started a very successful business and I think she might just be after his money (child support). 

Huge ninja

Summarize the given text in a few sentences.
<bot>: woman is trying to get my boyfriend to be the father of a child that already has a dad just to get out of the marriage. What can we do?