Another point that people forget when keeping a mother plant is that aswell as pruning the leaves to keep the growth above grounds in check, you will also have to prune the roots periodically. If she gets pot bound... she won't be happy.

You can either do this by physicallly removing her from the pot and trimming the roots - this will slow her down for a couple a weeks but she'll soon start flourishing or you can use a chemical root pruner - This is smeared around the inside of the pot and rather than touch it, the roots will double back and keep growing.