It'd be better if the male had a bigger kok, but w/e I'm just picky lol. The lip lock sessions should not last longer than 5 minutes, any longer and they need to be separated.
that is close to what my male and female do. however not quite as aggressive and I'm trying to figure out if they are mating or just fighting. mine will do that then stop after a few mins then start again the next day and stop again over and over.