The male tends the eggs in the bubble nest...Young males are eventually separated (and some aggressive females) to keep from destroying each others fins. Bettas are very challenging to breed and unless you plan on being available every 4 hours for feeding during the day and constantly keeping the fry tanks clean (not to mention jarring 100 fry), you should probably avoid them. You can be looking at a significant investment just to rear 1 spawn.
Yes Khombre, most females can live communally...