Lots of back story but at what age (if at all) can an unhappy child choose to change which parent they live with? How does this work legally? DSD (11) wants to move in with us and now would be ideal (before she starts secondary school). Geographic distance makes shared access an impossibility. We'd love to have her (but don't want to influence) but we fear her mother would want to retain her for financial reasons as opposed to what is best for the child. Could really use some advice on legalities and how to go about things properly.