For mouthbrooders, which I believe johanni are:
If they are breeding, the male and female usually make a "T" shape with their bodies. They will alternate positions as they circle around each other. Each one following the other around their rear fins. The male will usually shake his body during the process. (see Neds reference to demonstrate)
More than likely they will go through the motions but it will get disrupted if you are around the tank because they think you are going to feed them and that is way more important in their minds.
I came home from work today and I have 3 Females holding eggs. I missed the actual event, but I have been watching dress rehersals for a few weeks now.
This is their first time holding (mouth always looks full), so it probably won't go to term if it was even successful at all, but I'm still crossing my fingers.