after the mother has the fry you will want to get her away from them she will eat them....keep the fry in the net or go invest in a fry tank..most people will use 10gallon for this...also when she has the fry dont be alarmed when they look...kinda dead they will sink at first and then swim a bit....you will need liquid fry food but if you dont have any crush your flake food into a fine powder like form they will eat dont worry...they are very sensetive so dont get upset when you lose a few..she has plenty more coming...
but yes isolate her you will want to get her in the net before she has them otherwise they will get eaten alot quicker...how long has she been plump?