actually i mean she isnt storing sperm from a previous mating. she can store it from only one mating for over 6 diff births. so if shes not opregnant currently, it doesnt mean that she wont be in another month.
I dont believe mollies can breed with swords. it goes like this:
molly+guppy
sword+ platy
reason being that the pairs are from the same family.
hold on...maybe they might try it but only the above pairs will produce healthy, fertile offspring.
sorry i dont know much about molly + uppy, but since im am currently trying to breed platy w/ swordtail in know for sure that that pair can mate sucessfully. they are part of the Xiphophorus family. molly/guppy are Poecilia.
diff families Xipho and Poecilia should NOT be able to make any surviving offspring because they are so different.
I remember also reading that there is some wild molly female species, where the females account for near 100% of the population and they breed with other fish, not just mollies. thats one weird molly species...