I always saw the Mandalorians as.. well.. rapists. They take compatible female species and have there way, use the male children to replenish there armies and leave the female children to be used later in the same manner. If Mira wasn't freed she would have been used to breed more Mandalorians. Also I see that their genetics would yeild more males than females due to their male dominant nature, so much so that they need females from conquered worlds to replinish the Mandalorian species.