My molllies have never bothered the fry, at least so far as I know, as long as they were kept fed. Considering I had two adults and like thirty fry in a 10g with two fiddler crabs(meaning a lowered water level so they can get out), I think they'll be fine with their folks.
Depending on what kind of fish you have in there with them, the fry may grow up totally unmolested, or they may be someone's dinner as soon as they get big enough to be noticed.
I've got a huge bala shark, a decent sized placostamous, a few pictus catfish, and other assorted small fish that couldnt eat the babies. They've been good for a few days now, I think they're going to make it. A handful at least.
Each soul stands alone. - Stephen King