I have two dalmatian mollies, one of which is a female. When I bought her she was really skinny like my male, but in two weeks she has doubled in size.The first photo was when I brought her home, and the second photo is a current photo of her. I have not noticed her hiding out anywhere, but she is a little meaner than when I first brought her home. Is it possible that she is pregnant and if so, when should I look for her to have the fry?