Some cichlid breeders who keep pairs, and don't want females killed, keep the divider in the tank permanently. Or if the female is smaller than the male, cut an opening in the divider only she can fit through.

Not the most aesthetically pleasing tank, but often necessary. (what size tank is she going into?)
You may be lucky and find your pair are copasetic after only a few days, but it is always best to keep vigilant. Things can turn overnight, and that female could easily "wake up dead".
I have had copasetic pairs spawn safely 3 or more times, and on a dime the attitude of the male changed, the tide turned , and one or the other wais dead.
Not a pleasant sight just after the wait, and time and money spent on the fish, and shipping.
Your male owns its tank, and any addition may be thought of as an intruder, unless she is immediately hot to trot.
also, make sure your divider is securely weighted down, a rutting male can easily tear a flimsy one down not secure enough.

I use heavy rocks on the horizonal pieces.
