Guilt

Does anyone else think their partner lives in guilt? We have 2 kids together and he has 2 kids from a previous relationship. Anything we do with our kids when the sk aren’t here he has to replicate, even a day out to the farm he will have to replicate it so they do the same. Buys anything for our kids? God forbid he now has to do the same for his kids. Even though they get child maintenance so they’re always in new clothes etc and I have to fund our kids clothes, shoes, toys etc. It’s like I look after my kids financially and he looks after his. I even buy his kids new clothes sometimes. There was two occasions we had professional pictures taken of me him and our first child as the second wasn’t born. He would NEVER have a photo of us anywhere because his other kids aren’t in it. We see them every other weekend and it’s started making me resent his kids slightly as he isn’t letting himself have or enjoy a life with us. I feel like we’re all hidden away and come secondary. Even going on holiday as a family of 4 comes as a battle to even start a conversation about it. His kids go on holiday 3/4 times a year, we have one yearly holiday that we agreed his kids would join every few years. But that all even had to be hidden from the kids bio mum and even my partners family.