see, if it's a true female to start with, it will only have two xx chromozones, therefore any pollen created from that plant using a chemical like cs will only carry the x chromo, therefore all of the seeds made from said pollen will all be female..
this is where i see a lot of people getting confused about feminzed seeds.. they all say it;ll carry the hermie trait over to the offspring.. but so long as the parent plant was stable, and the only reason it grow balls in the first place was because someone sprayed it with cs, then the offspring will be just as stable and unlikely to hermie as the parent was..
some strains are notorious for being unstable to begin with, like say og kush, trainwreck and sour diesel to name but a few.. w/e you work with those strains, being they carry a hermie gene, pretty much any x you make with them will have a greater potential to go hermie some where down the line.. of course breeders try and work out that trait, but it's not the easiest of things to get rid of in the genetic poll since the hermie trait is said to be dominate instead of recessive..
hope that helps a bit m8..