Dealing With a Teen Who Is Acting Out?
An obvious suggestion is to wait until she seems to be in a decent mood and ask her how she feels about your ex and everything that has transpired. Dont ask yes or no questions because the answer will probably be no. If you are able to view her Facebook/Tumblr...
Parental Consistency?
He is setting a bad example and precedent for your son. If one parent has already said no, there needs to be discussion between both parents before that changes.