hello and welcome :)
i need to ask a couple of questions from you,for us to be of help.
what size is your tank.
what filter are you running.
what is the temperature.
how long has it been cycled for/is it cycled ?
what fish live in there.
the female was probably pregnant when you bought her,they hold sperm
for some time,you soon will have fry on a very regular basis.
she will be hounded by the males,so my advise would be to either buy more females,
or return the males altogether.
if you provide plenty of caves , plants that are either real plastic or silk,
you'll get a bigger survival rate of the fry.