You're right, it's turning legal. Since I didn't give her the answer she wanted to hear before 3 PM (her arbitrary time constraint), she decided that I don't get to see S this weekend.

She was at work at the time she decided that. So I tried to find out where S is and who he's with (because she has let one of her OM babysit him before, and it was past S "normal" bedtime). She has refused to tell me that information.

So yeah. She's making a mess out of this legally.

She refuses to pass information about S through anyone except her sister.

Well, once I lock down A, she can pass information through him/her.

I hate this situation. This is really bad.