My 16yo daughter is refusing to go by the agreement my ex and I had - which is sharing the children 50/50 every other week. It is hard to unpick what is normal teen behaviour or something else as it all started after ex moved out. She started the normal teen rejection behaviour- not wanting hugs, not wanting old nicknames, not wanting to spend time with me etc. That would have been frustrating but ok as it would at least be normal. But then she started refusing the custody agreement- she wants three weeks there and one week here. This is also hard for my son who doesn’t like not being with his sister during the every other week he’s with me but she’s at their dad’s. We later found out right after we said my ex was moving out, she googled to find out if you could choose where to live. She had planned this out. Now this weekend she announced she’s upgrading her phone and taking it out of my phone contract and paying for it herself so it’s ‘legally’ hers - it’s not like I even take it away as punishment or anything. She just wants to be not affiliated with me. When asked by myself or ex, she says we have nothing in common and she can choose who her family is like I did - my family was abusive and I had to keep my kids safe from that and cut off contact years ago. To have her correlate the situations is like a gut punch. She’s normal with my ex and no issues when she’s there. But she’s rude and dismissive of me and acts like I don’t matter and she’s biding her time. I’m at a loss and don’t know what to do- if it was normal teen rejection I would suck it up best I could and try to wait for her to come back to me. But this is deliberate, planned out rejection and I can’t find a way around it and having trouble coping.