Confessions of a Cat Breeder

Your cat sounds like a wonderful feline to have on a farm. I believe the younger cats are accepted by her as in the past they have shown her proper feline respect. They have probably been visiting her since they were quite young and gave her the honor she deserved as 'Head Cat'. As she allows them to sample her food she has accepted them as a part of her feline family.
There may also be a possibility of a genetic relationship envolved. If these cats share a blood line your feline may have identifed a similarity of 'family scents' and was able to allow them passage into her territory. I have witnessed this same strange acceptance with a territorial purebred persian female that accepted a grown cat back into her cattery with no fuss. I was as amazed as you are. Please keep us posted, I would like to know what you have named your little girl.
Best wishes,

Jasmine,
Feline Behavior Consultant
Confessions of a Cat Breeder