No they shouldnt be housed together this cause stress on each of the animals, also the male when they mature will want to breed over and over again with the female before they are ready . one can be more dominante then the other thus causing one not to grow as much not get enough food or even time to bask.
There is also the risk of fighting nips of toes and missing tails even sometimes death they also dont know that they are related.
The best thing and good rule of thumb is 1 viv 1 beardie, I myself have 2 beardies right now male and female they have their own vivs they dont like it even when each othet comes close to their home. I also am getting another baby next month and she has her own viv as well.
Its just a better rule of thumb.
Safer for them as well.
Hope that answers your question
Joanne