an xh, his FF, Thanksgiving, MIL, and one psuedo-R

[Dom R]

All his babbling excuses about "you should have told me", etc, etc. make no sense, of course.
It's pointless trying to "argue" with someone, when they are just babbling.

I think that you should just tell him what it takes to make things right with you. and stick to it.
IE:
"I dont want to hear excuses. If you really care about ME, then this is what you have to do.
As far as our child goes: you're entitled to see our child [xxx time], and i will not withhold him from you for that time. You are NOT entitled in any way to see me otherwise"

[I think you've done great with what you've said to him so far, btw. i think it could just be taken that one extra step further]