I am not aware of what species of tortoise you're keeping, but only one male should be kept along with similarly sized multiple females. If agression still occurs, a larger living area may be tried with multiple line of sight hides for security. If the male continues to be the aggressor, he should be removed to his own properly sized yard. On the event that aggression continues among the females, it is likely that their yard is not large enough and supplied with line of sight hides. Some species of tortoise, such as Russians, are best off in solitary lives, except for mating. Other spevies, such as Red Foots, due well in groups. We keep 4 CDTs, 1 adult male to 3 females. This groupimg has worked for us. Our tortoise yard is approximately 70' by 20'. We have multiple trees, plantings and rocks for them to have appropriate privacy. I hope that I have been of some help. It may be of help for us to know what kind of tortoises you have, their gender and sizes, as well as the logistics of your tortoise yard.
On re-reading your original post, I see that a new mom should never be kept with her new, very tiny offspring who doesn't recognize as hers, but views them as interlopers. Although what I posted above is true, it may not all be applicable to your case.
