Being a stepparent is hard. It's probably the most unappreciated role in a family. If you're lucky your step kids have a bio parent who is supportive or at the very least doesn't talk shit about you to their kids. That was not my case. My husband and I started a relationship in the middle of his divorce. It had already been going on for months. I was supportive in any way I could be. When bio mom got arrested, I gave up my bed in my apartment to the kids so they'd have a place to stay.

I'm new to this site, and after a lot of anguish and no one to talk to, i can't take it alone anymore. 
DH and I have been together 5 years, SS and SD are 10 yr old twins. BM has openly said she wishes she never had to see DH again and wishes he didn't see his children. We have finally got to a point where we are allowed them every other weekend (sat and sun only, not fri night as is her "special" night with them) and half of all school holidays, but always 7 days 6 nights with us and 8 nights with her so she gets slightly more. 

BM is crazy. She tried to break me and my husband up when we got together. Said we shouldn't be having a baby because hubby "shouldn't have another kid until he can pay for his first one". That was the first clue that all she wanted was money. I'll get back to this later. 

I've been called the new girlfriend and that I'm unimportant. That what I say doesn't matter, all that. I've known my husband for almost 10 years now. 

Now to her parenting. 

It is abysmal and nonexistent. 

Goodness, I cannot keep up with the BM’s schedule change and the lies that follow. Just kidding, they are all in text. Lol I have 2 skids and my husband and I have been so nice to change the schedule during the summer to make the BM happy. You think it worked? Nope! She asked us to change the dates again, so she can go on vacation two weekends in a row. I’m mainly watching the skids and I do have the summer off, but I still have plans for myself. I’m nice though, so I accommodate the BM. Her schedule should be set now, right? Nope!