My mum overreacts all of the time!Or is it because of us?

When you come back from visiting you dad and you say that you've had a good time, your mother feels rejected and threatened that you may love him more than you love her. It's a very normal reaction, since she is the one raising you. Give her a little slack, she's under a lot of pressure. The next time you visit your dad, when you come home say something like it was okay, but I'm really glad to be back home with you.