q for any cichlid keepers

I was chillen at my friends the other night and was watching his cichlid tank - we think that his pair of johanni are breeding as the female looks to be carrying eggs....

the wierd behavour I saw was i duno interesting? we couldnt figuve out exactly what the fish where doing.. I thought they where first mating but now i'm thinkin it was more of a fight.... Basically what happened was a female p.saulosi was locking lips, circulating and doing alot of body "shaking" she was doing this with the male johanni.... anyone have any idea what was going on ? I figure they where fighting?