We cant stress enough how important it is to keep your dragons seperate, especially if they are mating and she becomes gravid.
As diamc has already mentioned as your male has become sexualy mature there is a risk of overbreeding which can seriously damnage your females health.
Dragons nearly always are stressed by their housemates, even if they do not show any outward signs. Her sitting on him is a sign that there are dominance issues.
Other than dragons becoming stressed when living together beardies can and do attack eachother, unfortunatly dragons are not like dogs, who can be taught about naughty aggressive behaviour.
They can live in apparent harmony for months and then one day snap. Once it has happened once, it will happen again and again.
Dragons will think nothing of nipping off a chunk or tail/toe in order to defend their basking spot, its just in their nature.
I dont mean to scare or scold you, but I want you to appriciate what can happen:
In my time keeping dragons I have rescued two dragons who were living in a viv with other dragons.
Dexter was small for her age and was missing a bit of her tail, most of her right arm, most of her right foot and alot of her toes.
Ruben had his leg and arms ripped off at the joints by his clutchmates.
There are cases where dragons show no signs of agression towards eachother, and there isnt too much bullying but it is a risk that is simply not worth taking.
I cannot tell you the amount of times we have read about one beardie not eating well, we advise the owner to seperate and then within a week we get replies saying how much better their dragon is doing.
I would suggest you separate your beardies with a cardboard screen for now until you can figure out a perminant solution.
Your dragons will lead much happier healthier lives apart.
Holly