I don't think the swapping of clothes is the real issue here although it appears to be. What were the circumstances of your divorce? Did you want out or did your ex? If you are the one leaving the marriage then she might not be happy to see you happy and may want to make your life hard. If she's the one leaving then is she poor? However you look at it I don't think she's happy with her life if she is trying to create issues with you. P.S.: do you pay her child support??