Um, obviously I'm not an L, but to heck with the property; I would want an L that would have their #1 priority focused on regaining custody of the kids. My understanding was that your X was violating your agreement-pardon me if I am wrong?
Until the legal can be straightened out, which is time-consuming, I would advocate really good communication with your kids, I would make it a 100% priority to jump your X's hoops when possible to let your kids know that they are your top priority and when you aren't able to then let them clearly know why; kids are usually pretty smart imo. My X has tried some brainwashing techniques in the past too,"your mom didn't pick you up tonight b/c she doesn't love you" but it just doesn't work when you do the above I've found...