Macon Your stepdaughter has a problem talk with her.. to her not at her. Find out how she feels 1st. Tom, Tom, and Jeffery provided good feed back but Jackie and Jane are booth just there some where. 1st of all to Jackie putting a 12 or 13 year old in diapers for motivation is not normal. If you have a child that age that will not do as she is told then she simply needs a spanking. Macon there are a lot of possible causes for this problem sometimes instability or an upsetting experience maybe family history. Most of all think of the child try putting yourself in that situation. I remember myself what it was like to be that age growing up becoming a woman and dealing with a bedwetting problem at the same time. Try lots of hugs to help.Stephanie