I will agree with others that the "fatness" is not from eggs. When I had my AC's they breed a few times, never did I see them get fat. Just all the sudden I would notice their mouth looked swollen and when you would look there was eggs in there. The best part was when they "hatched" though she would open her mouth and there would be all these babies inside!!!
Is this one of your new females???
Is this one of your new females???