I'd start watching your female lemur's behavior very closely from hear on out. our females start showing aggression between 1-2 years of age. Generally the adults only bond with one person, and will 'mob' anyone else that gets close. Does your girl still have her baby fangs? Those are VERY nasty, and can leave some impressive scars. We have a neutered male that's 2. We are taking him to our exotic vet this weekend to remove his adult fangs. As he's getting older, we've noticed that his tolerance towards children is wearing thin. Just something about kid's big eye to face ration that makes him think that they're challenging them is starting to upset him *shrug*.