She looks a lot like my Dalmatian Molly, who is about a week and a half to 2 weeks away from dropping her fry. It'll be her first time and thats why she isn't big, I would think it's the same in your case. You can tell they're close because they start to get sort of square looking in their tummy area.
Btw even through the blurryness you appear to have a very pretty molly I prefer more white to black in my mollies
Do you have males? If not, then you can expect her to drop 3-6 times as they store sperm for up to 6 months. My platys drop fry about 3 times a month (once a month per female x 3 females lol) I have two that are about to explode.