Why does my mother always hide her wet pads?

Take a look at S.A.C. adult incontinence disposal bags by Golden Group International. They are opaque, discreet and seal with a draw string. They are easy to grip and open so even adults with limited dexterity can handle them easily. They help to reduce odor and definitely hide the items from view. They are opaque but white so they blend in with tissue etc. in the bathroom and don't stand out. There is a dispenser for these that can be placed on a wall near a toilet or they can be put on a table, in a drawer or shelf however having them right where you need them is the best idea.

She is probably embarrassed. You might consider a diaper pail in her room next to her bed or in her bathroom. My mother used to put hers in a trash can where her dog would find them.