Depends on how you got the hermi bananner... was it through the plant having herm-prone genetics, or did you apply gibberellin, or photoperiod stress?
Herms make fem seeds; yes, but I would not trust those seeds to not carry the herm trait unless I knew the grower put otherwise herm-free plants under a LOT of stress that would not be recreated in my growroom to acheive that end.