I can't tell from the pics what is going on. I'm not a vet either.
She looked pretty small in your original pics of her a while back but in these pics she looks bigger. Was she rescued off the streets? If that is the case they don't really know how old she is.
In any case I would still be doing my utmost to have her aborted if she turns up pregnant. If she has only just started showing she isn't too far along.
What foods are you feeding her? Is she having a hard time adjusting to the food? Does she seems gassy at all? Is she having diarrhea issues? That can cause a swollen belly as well.