Help! when my mother passed away in November, I was given 2 peace lilies and a prayer plant. The leaves on the lilies are just sagging and droopy and the leaves on the prayer plant are like "folding'. I thought I was over watering them but I am not sure what to do!!

Put the peace lilies were they will get bright indirect light (no direct sun) or the leaves will burn. Water enough so it comes out the bottom and throw out any excess in the trays so they are not sitting in water.You want them to have evenly semi moist soil at all times, not soaking wet and not completely dried out.Don't water until the top inch or two feels close to dry.
dropping leaves can be from over or under-watering, or too much direct sun.

The prayer plant likes the same kind of light as the peace lilies, out of direct sun. Water when the soil feels close to dry, but not dried out. With the right care, all your plants can flower.

Feed them all only half strength of what is recommended now and then and only in the spring/summer months, none in winter.