Need a sanity check here.
OH pays maintenance at CMS level to his ex for their three children. We have them every other weekend and half the holidays and provide everything they need whilst they’re here, as well as paying half of school uniform and trip costs.
I earn double OH’s salary and pay around 75% of our household costs. He is paying off joint debt from his first marriage; I pay for the children’s holidays, clothes and hobbies whilst with us. We live ninety minutes from the children (his ex moved after the split and this is as close as we can be with OH working in his field - if we weren’t worried about proximity, we could both earn double living further away in the UK).
His ex has been commenting a lot on the children costing more as they grow up (they’re primary age), the cost of living going up and the fact that she’s had another baby so can’t work as much, and I’m expecting a formal request for more maintenance money soon. We have a cordial relationship. She has a partner, who is self-employed and she works some hours for his business. I don’t know a lot about their finances but they take more holidays than us and seem to have a similar lifestyle, albeit in a cheaper region. We’d happily have the children for more of the holidays or even full-time but this has always been refused.
AIBU to just say no? If OH was paying half our living costs, it’d be his choice, but he isn’t and has nothing left at the end of each month, so realistically any increase would be coming from my salary.