I had a breeding pair of mollies that just kept popping out 2-3 per litter bi-monthly. I never really did anything special, I did have floating plants in the aquarium though. But other than that, they got their flake food daily and that was that. I never had an issue keeping the little ones alive, until I introduced a stingray and that was the end of all the mollies.
But while I had them, I never noticed any special behaviour which I though was strange. The male seemed a little aggressive, but the female pretty much stayed alone in the floating plants.