I have a mother and son who just tolerate each other. The male always chases the female. So she isn't thrilled with him. She hisses at him. I see that he wants to take her spot and when he isn't around, she takes his spot. It doesn't escolate but I do stop it if there is hissing. I just hope they are happy. If she goes outside and he is around he chases her and she usually runs into the house. Yet he will let her eat his food. So basically is the rule if they don't fight all is ok? I just think it is too bad they can't enjoy themselves with each other. She may be older than estimated, 3-5 years. He is 2 years.