It's not a competition between you, she will always come first
Nope, it doesn’t work like that if you intend to have a healthy relationship. It’s a balancing act and I think carving out one weekend a month due his partner is actually quite a good balance.
Yes OP knew he had a child but then again her partner also knew he had a child and would have no business dating anyone if he wasn’t willing to occasionally put his partner’s needs first too.
Any, I got side tracked... you sound like you’re doing a lot for her and have good intentions. Your DP needs to step up more and keep her occupied so you can get some peace too. It’s lovely she wants to spend so much time with you but ultimately the contact time is so she can spend time with her dad. You’re just a nice added extra.
It’s worrying that her mum is struggling. Do you think her mum could be reasonable with your DP? Could they sit down together amicably and discuss the best way to move forward?
It can’t be much fun for mum either if the little one is playing you all off against each other and situations like that only happen when there’s not proper communication between the parents.
My DS has tried to play my ex and I off against each other but because we communicate then it’s quickly nipped in the bud.
Honestly the key is to be consistent. Kids push their boundaries to test and see where they are. If those boundaries are firm and consistent then they get bored of pushing them and just learn to accept them. With that acceptance comes a sense of security and happiness for the child.
Your DP needs to step up here and sort this out before the baby arrives. House rules, him doing activities with her alone to give you a break, pulling her up if she lies about you or things that have happened.
Keep doing what you’re doing and get DP to step up and it’ll all settle down.