Daughter wants to move in with her mom

Ramie, I feel for ya. Although each families trials and tribulations are unique, my experience was similar. Raised my 2 boys for the most part by myself. Did that since they were school age. Half n half since the day they were born. Your daughter is absolutely 100% normal. Although the boys were with/raised by me, I got next to nothing in child support. Took me a while to wisen up and take her to court. My oldest and I especially really started to butt heads...skipping school, breaking the rules etc. He tried pushing and pushing(in my opinion)to see how far he could go.Both boys actually moved out. Oldest one saw I wasnt going to compromise and moved in with his mom. That was about 7 years ago and has moved back in with me and Lori a few times since. Youngest came back and ended up finishing high school. Both have their grade 12's now. I see them most times when Im home for the weekend.
Their mom was the same, between me and my parents we kept the boys in sports and were always there to watch them play. Mom hardly ever. Mom has 4 kids with 3 different dads. Her other 2 kids dont even know who their fathers are. All the BS started once the boys love eggs started to turn fuzzy.

Your daughter has hormones going and that plays a part big time. Very impressionable at that age. That is the most important time to surround her with a proper structured environment. Do what you can to keep her with you and keep her involved in activities...dance, gymastics, hockey anything that may help her with an outlet.
This is just my experiences and like I said everyone's is unique. I love my boys with all my heart and wondered what if I would have compromised?? BUT both my boys are now in their 20's and realize the choices they made were I have no regrets at all. When they come for the weekend they tell me "this feels like home"/
Sorry for the babbling here, hoping that there are some similarities/experiences that may help??

All the best.
If you`ve got proof of her mothers lifesyle,, don`t sound like a court in the land would let her live w/ her mother! and sounds like her shack job is putting her up to it, child support "will" follow!!!