I may need to get rid of the adult female guppy, woke this morning to another litter(?) of about 20 baby guppies - that's the third time she's given birth since the start of May without the presence of other adult males.
Yeh, that’s very much the modus operandi of livebearers.
You’ll have a bunch of females in the fry as well so it’s a never ending cycle. Few people want female guppies for that reason. Platy’s and Molly’s are the same.
If you had adults in the tank - male or female, they may pick off the fry and ‘manage’ the population. Other mature fish may do the same thing.
There is really not a lot you can do with guppies other than keep make only tanks or have someone you can offload them to regularly like back to the store.