Firstly I wanted to start off by saying that I have no issue whatsoever in my DP doing things for his DS, it's the way his ex seems to dictate it all that is starting to grate.
Firstly she books things in for herself before checking whether DP is available. Last Friday he got a call at lunchtime to say that she had just put her car in for a service so could he pick DSS up from school. Not his contact day but DP is currently working from home so is available most of the time for emergencies etc. Just before that she'd made a beauty appointment for herself so needed DP to pick DSS up from school but didn't ask until the day.
They agreed for DS to start swimming lessons on a Sunday. DP takes on his weekends, his ex on hers. But more often that not his ex will text and say that she's not feeling well, or something has come up so can DP take DSS to his lesson that day. DP won't say no because DSS enjoys the lessons.
This kind of thing happens all the time, and on the very very rare occasion he says no because it's too short notice and he genuinely can't, he'll get a barrage of abuse saying what an awful Dad he is.
DP has DSS 40/60, does majority of medical, dentist and hair appointments so it's not like he's not involved.
As I said, it's great that DP is so involved with DSS, what I'm finding hard is that he will immediately drop everything for a last minute request from his ex that either wasn't actually required, or should really have been asked in advance!
Am I being unreasonable?