So my yellow molly just had babies the day after I got her (easter morning) and I think she's pregnant again. Is she ready to drop soon? Then I have a dalmatian molly who look bigger now then before. Is she pregnant too?
The yellow molly is probably pregnant, but won't be ready to give birth for a week or two yet, but the dalmation has 'squared off' (you can see the 'corners' on her belly very well), so she's probably due in the next day or two.
I would leave them where they are; if you want to keep a few fry, then add a load of hiding places; bunches of fine leaved plants are good for this.