My sister is trying to potty train her 3 yr. old boy. A few months ago she started and he was doing really well. Then our nephew moved back into town. They aren't trying to teach their little boy. Since he has been back, my sisters little boy has reverted and refuses to go. Especially number 2. She has tried making it fun, everything. He won't poop, he cries like he is scared to do it. Even if she puts a diaper on he won't poop. She has another boy that is 21 months and is expecting a third in Aug. She is at her wits end. Any advise will be helpful. I can't really help her, my daughter was very easy to train. She has also given him stool softeners and he refuses to go. Please help?!