how long can male and female stay together

i have to go away for a few days. i have had 4 plants on 12/12 for 9 days now, 2 of them show to be female but the other 2 i dont know yet. will it be safe to leve them together till i get back? i have someone to feed them but he cant sex them.

i would say it will be ok for a few days ,......funny your fems showed first though ive never had fems show first its allways bin the guys .