Tessa- There is something called parental alienation...look into it and see if it fits the rest of the situation you guys are in. I am a mom and I have two daughters. They are a bit older but they do both have cell phones and snap chat on their tablets. Their dad helped both of them set it up, though. It wasn't me pushing it on them so it made a huge difference. I also saw where my kids started trying to talk to me all through the visitation with their dad. I talked to him about it and told him I didn't like that because it is time they should be focused on them not me. He agreed and we both talked to them about it separately. Likewise, I expressed how I thought it was making their dad feel and how that isn't fair to him. It died down for a bit but then started up again so I eliminated the snap chat and told the kids I was at work and couldn't talk. I know how difficult it is to let go of your kids even for small visitations sometimes, but it was a choice we made when we divorced. I miss them so much when they are gone for longer summer vacations but I can't carry on. That's not fair to the girls! They are looking to us as examples for how to act and react to everything. The reality is my ex is not the greatest dad he has done a lot wrong however he is still their dad and he truly loves his children. Now, I don't know if your husband can talk to his ex and set boundaries and ground rules or not but it definitely needs to be done. It may open "mom's" eyes to what she is doing to the child and the father's relationship not to mention their time together. Lord knows if I was to blind to see what I was doing to our children I would want my ex to be able to come to me...and I would fix it for our kids. I don't have to like him. We don't have to be friends. But, when we have kids together we have to work together regardless of our feelings because it is in the best interest of the children. However, on the flipside, if my ex is doing something definitely wrong with my children there...I will not trust him with them without checking on them constantly if they go at all because of it.