C.,
How frustrating. My 3 yo son is not using the potty regularly, either. I am just keeping after him, gently suggesting he go to the potty to poop and pee when I know he needs to, even if he doesn't go, we don't make a fuss about it. I sound like a broken record, but I want it to be his choice, when he's ready. However, we do not change his diaper right away. We wait until he notices how yucky it smells, etc. We just got him to wear big boy underwear, and am dealing with the "end result", however, I think regular underwear will make my son even more aware of what he is doing and how much easier the potty will be. I think your mom is right, he will outgrow it, but in the meantime it is frustrating, I can relate. Take care!