Do you have any kind of agreement with him? Is he supposed to take her at any particular time? Kind of seems like he never shows up, pays child support or does anything for her anyway, what would you have to lose by saying no? What's he going to do, try to get custody of her? like that's going to fly.
Surely you don't have to let him take her if you don't know where she is going to be.... especially when he is abusive and unreliable.

ETA
I dunno, but after his last performance he can get stuffed royally.
:yeahthat:
What Lulu said!