I just dont get it - baby mama drama rant.

I met my husband back when my stepson was less than a year old.  At the time we met she had been keeping him from seeing his dad. Every week he would text her asking if he needed anything, how he was, and when he could see him and we always got the same thing : no, fine, idk. My husband wasn't in a place at the time where he was able to file court papers, he was temporarily at her mercy but he was still trying. After months of trying she finally let him see him. He had dinner with him- with her there- this was in October just before he turned 1. Over the next few months he only got to see him a few times and it was all on her say. She faught with him multiple times wanting him to just sign his rights over. She didnt care about him having his father, she just didn't want to deal with him or have to coparent.  By spring he had started taking him to the park where she should sit on a bench on the sidelines watching them play. By the end of summer he was taking him to the park by himself and even to dinner and dropping him back off. This whole time there's no agreement in court, no child support order, nothing.  So late summer he had been pushing her to let him take him for he day so he could bring him to our house, I had still not met him yet and we had been together well over a year and were engaged at this point. She wouldn't let him. That's when we had had enough. We got married that October and filed papers against her November (he had just turned 2).  After she got served we calculated what his child support was and started writing her personal checks. They sat down and came to an agreement outside of court (thank god) and we finally got to bring him home. The agreement was every Sunday during the day and every other holiday. The agreement was set into a court order in February and he began paying child support through the court. After that things started to get better. We got in a routine and they were able to communicate somewhat.  Fast forward to October. She moves in with her new boyfriend. He has a son from a previous relationship so she wanted to changed the visitation to every other weekend so they could have him all weekend when they had his son. That was fine we were so excited to get him overnight! Part of that was that child support would be reassessed because my husband had gotten a raise. That was fine we totally agreed and we told her that in order for his job to take more out they had to have a court order and that she would have to file for modification. Over the next 8 months the every other weekend schedule was working well, my stepson loved spending the night, he adjusted well. She told us 4 times over this 8 month period she was going to file papers- almost in a threatening manner. We agreed with her each time and even gave her info about going through DFS to avoid a court room. So a month ago she sent my husband a big long text giving him 2 choices. Either we could write her a personal check for the difference in what child support would change to and keep seeing him every other weekend (which would give her no incentive to file) or go back to the Sunday schedule which is still the minimum ordered by the courts. So we went back to Sunday's because we weren't going to play her game. Since then he's been misbehaving a lot more ( imagine that you change a 3 year old schedule he's going to act out- kids thrive on routine! ). Last night after we dropped him off she started texting my husband going off about how he was talking in the car. She ended up calling him yelling over the phone I could hear it clear as day and it turned back into just sign your rights over, he doesn't need you, you weren't there for the first 2 years (which he tried to, she wouldn't let him). Come to find out she wasn't going to file anything ( guess that extra child support she changed all this over really didn't matter that much to her seeing as how she was going on about not needing our money ) so we're going to file and she's going to be pissed because we had our son in May which caused his deductions to change and now she's going to end up getting less than what she is now and we're more than likely going to get weekends back (it's a pretty standard schedule to order here, esp since we didn't it for 8 months no problem). 

I just don't understand why she wouldn't want my husband in their sons life. Like there are so many dead beat dads out there where moms chase them for child support and here he is ready and willing to pay his child support and be there any time he needs him. If I were in her shoes I'd be so grateful he is stepping up!! Seeing him fight for his first son is one of the things that made me want to have kids with him even more.  She just makes me want to rip my hair out. She's so immature and seriously not thinking about what's best for their son. Just about her!!