Your poor females are going to die once they reach sexual maturity. With mbunas, you need to generall keep 3-4 females per male. If you only have 1 female then the aggression is not spread out and the male will chase her until she dies, especially in that small of a tank.
I am not trying to be the bearer of bad news, but I am just warning you that if you want to add fish do one of two things - either take out the females and have a male only tank (where you buy a single male of each species and have several species in the tank) or skip the aulonocara and buy more female kenyi and labs. If you don't do one of these two things, I am afraid you will end up frustrated and starting over in the end.