I don't remember the correct term for it but it sounds like the dog is urinating from fear. The rolling over is definitely showing extreme submission from fear. I actually don't necessarily think that spending time in the laundry room is necessarily all bad. In my experience dogs that have been badly traumatized need a long time in a very low stress, low stimulation environment. Depending on the dog's personality she might begin to trust one person before she trusts others. A crate might be a good idea for the dog if that is an option. It would give her a safe place to retreat to if she became frightened but she could still see her environment. If one person started holding on their lap every time it was possible that might help. You could wrap her in a blanket or towel to prevent a mess if she is frightened.