DS is just about to turn 6 month. His dad and I split when DS was only a few weeks old. Ex has been very awkward with regards to co-parenting and has refused to stick to a routine of when he sees DS. Due to DS age, I was giving his dad contact from 4:30 - 7:30 3 week nights and all day Saturday. He changed the weeknights time from 5 till 8 - he made out it was for work reasons but he works flexible hours and he likes to go to the gym before it gets busy at 5 so I know he changed the time so he could go to the gym straight after work (he also shows up for DS wearing gym gear every time he takes him so I know he’s been at the gym beforehand)
Anyway, I didn’t say anything and let him have the contact from 5 till 8, even though it was messing up DS routine as I usually put him down to bed at 8pm. Last week, every time he brought DS home, DS was asleep in his car seat. He would then wake up and wasn’t going back down until almost 10pm. I asked him to change the times from 4pm till 7pm and explained why but he has point blank refused. I said it’s in DS best interests to be home and settled at a reasonable time, especially during winter months when it’s getting dark early. I’ll also be going back to work in a few months and want to have DS in a good routine by then.
Would I be unreasonable to stop weeknight contact because of this and only allow him to have DS on weekends?