You really do not seem concerned at all about the health of your beardies. Peeling off their shed is like ripping an old scab off.
A male WILL breed your female constantly once he hits puberty. And 15 inches is a Juvi, not an adult. Do you know how stressful breeding is to a female? The male BITES onto their neck ( Yes, skin ripping can occur) to breed them, and WILL NOT stop breeding her. If you do not provide the proper set up once she is gravid, which means without the male as it is, she can and probably will become Egg bound. She definitely does not look big enough to be breeding either.
BTW, unless your aquarium is 8x4 feet, its not big enough for two beardies.
I can tell you right now that you are not experianced enough to breed, or raise the 50+ babys they can have.