Youll almost have to have 2 seperate light set ups. One for flowerin ands one for veg. You can use panda film/black and white poly to make a divider/seperate area in the closet for your mother and clones. If you dont have enough cash to spend on another lighting system i would use cfl's and or the long flourecent garage style lights that hardly put out any heat for the mother.
hope this helps
BigBudE