I have been with my partner for 6 years. I have just given birth to our second child. He supports us all, we rent a nice flat in a nice area and have a good relationship but he is still legally married to his ex wife, whom he has 2 older children with. I try not to pressurise him and ruin what we have but it is starting to bother me that technically, I have 2 kids with a "married man". Whenever I ask about it, he says he will divorce her eventually, but that it is expensive and he is waiting until he can afford it. He is also worried she will try and take money from him. AIBU?