Many times the children are left out in this by the MLC parent. The MLCer has gone back to a time before the children existed. You have noted your W's teenage behavior. She may view your D as more of a peer right now and commiserate with her instead of parenting her.
You are needed by your D now more than ever. You're it as far as supervision and consistently being there for her. Do not let your D be a casualty of this.
As far as your wife filing, hang in there as it may change once again. Do not help her in any way with it.
Protect yourself financially as MLCer's are notorious for spending.
