This is about DH and his ex wife.
A brief timeline of their relationship- they were together for years, got married, had a baby and when the baby (DSS) was 2 she had an affair, DH found out and they broke up. She stayed with OM and they seem happy and have another child. All very amicable now but took DH a long time to recover emotionally. From the beginning she asked him what custody he would like and they agreed 50/50. He paid for her rent as he was already doing and some maintenance as she otherwise wouldn’t be able to afford to keep DSS in his home.
So a few years later when DSS was 5 she had had another child and was living with her partner (OM). DH asked if he needed to pay maintenance still as he had DSS half the time and was typically the one to buy him school shoes etc, and any ongoing costs such as school dinners were split 50/50. She said if he didn’t she would seek more custody of DSS so she was entitled to it. So DH dropped it. I met DH about a year after this.
Today DH and I have had 2 children, DSS lives with us 50% of the time (slightly more during the holidays) Relationship with exw is decent. DH hasn’t broached the maintenance issue again and won’t for the sake of DSS which I agree is the best thing to do. But AIBU for being annoyed that she feels like she is entitled to it? (If it matters we are not well off but comfortable and do earn significantly more than her and her partner)