Dilema

Dear Mom,

So I don't know what to do. I just got off the phone with Dad and discussing the sleeping arrangements for Jill and Jef this weekend. Alecia's son, Nick is getting married and the kids want to stay at my house, not Alecia's. Dad wants them to stay at her house for at least Friday night. I didn't fight him about it, but I know Jill definitely will. She doesn't feel comfortable around her and would rather be at my house. I know this is going to cause big problems and sour the whole weekend. I don't want to make a big issue about it either, but want Jill and Jef to have a good weekend. I know Dad feels like I overstep my boundaries as a sister and act too much like a mom, but I feel like I have to make up for you being gone and him not really being there for them either. Sometimes I feel like Dad wants his way for the just because he's the parent and no other reason. He's been more stubborn than usual and doesn't really try to see your side of the story. It's really hard on Jill. So, what should I do, push Dad into letting Jill and Jef stay where they want, or don't get involved???