D.H.
Hi N.,
Start giving her lots of water for her to drink!!! This is very good for her system and she won't be able to keep holding it. Do not give her any more diapers even at night. She is doing a power play. Show her the empty bag from the diapers and tell her you are not buying anymore.
Also look to see if anything has changed in her life. She knows she can control this area and that gives her power. Keep the childs toilet handy and set up but don't tell her to use it. Let it be her idea.I left the door open when I was going to the bathroom when I was pottytraing my girls. They walked by and saw me going potty. One of my kids was afraid she was going to fall in the big potty, because her bottom was so little. So she used the childs potty. Also give her lots of fruit. Good luck. D.