Just a little thing that popped into my head...
Peter had noticed that Maxine, his live in maid seemed to be acting shifty around him and always wanted to know the exact times he would be out of the house each day.
He suspected she was stealing from him, so he went to the local transformation centre and had them change him and exchange him for her uniform. Then the next evening they would pick him up and change him back.
He had to hang in the wardrobe for a whole day before she wore him and he figured he would find out what she was up to... But he wasn't expecting this!