My mom has started leaking from her incontinence underwear. When she stands up, she leaks down the back of her leg onto her pants.

This is a new occurence with her. The incontinence underwear and added poise pad will remain dry but I can't find a way to stop the leaking. She is quite small but her "depends" are not too large. I thought I had solved the problem by putting on two "depends" but it did not help. This never happened the first four months that she lived with me.