So I have three mollies in my tank. One male and two female. One female is a silver and the other looks like a calico cat. My silver is pregnant for the first time and has been pestering my male non-stop, she follows him like she were his shadow. Is this normal? the other tends to stay as far away from as she possibly can. My calico is the bully of the females also, which I would think the other way. Are my fish just weird?