@Dancingbinbags
Why should you give a crap about whether he's ''offended'' or not, when he doesn't give a shit if you get any child free time at all !!
Stop asking him, bloody well tell him how it's going to be in the future !
If you don't, then you've only got yourself to blame for falling for /succumbing to the ''it's easier if I let him get everything his own way 
Of course it bloody well is ! He does it on purpose so that he can get his own way ffs !
He lives in the same house as you = equal work/housework
He fathered the same children = he does 50% of parenting
He eats = he does 50% of cooking
He wears clothes = 50% of laundry
etc etc etc
He won't like it, but tough shit !
If he argues and you fully expect him to get up and vanish on Sat morning, then you put his golf clubs in your boot, and you leave him a note on the front door saying ''As I told you, I've gone out with my chums and do not expect to be back before 6pm. I look forward to eating the food you shopped for, prepared and cooked, sleeping in the bed that you stripped, washed and re-made, appreciating the vaccumed carpets and gleaming bathroom that you cleaned. I'm also looking forward to our 'family time' tomorrow, because I'd be very upset if you didn't participate fully and wholeheartedly (regardless of whether you're a teensy bit tired 