K.J.
HI J.,
I hear doubt in your voice when it comes to your husband. Not knowing your history, I cannot comment on his honesty. However, putting your focus on his honesty doesn't sound like your priority in this situaiton. If it seems appropriate to you, I would recommend that you try to work WITH the dad instead of against him. Your solidarity with him will help your daughter. Focus wholeheartedly on her behavior and support her. It sounds like she is having emotional "withdrawl" types of behavior when she comes home from her dad's place. This is very normal. Children this young cannot necessarily articulate their sadness or other emotions so she will need your help to express them and process them. Because they cannot express them verbally, they express them subconsciously through their actions. I think your daughter needs reassurance and incredible love (which I'm sure you provide), as well as feelings of security as she makes these transitions from one home to another.
I hope this helps.
Good wishes to you all!