Help. Molly pregnant

Hey Franna, can you send a full image of that breeder box you have that female in?

 

My molly looks very pregnant but she has been this way for a month at least.
Maybe conditions aren't right for her to give birth, but could it be anything else (she's pretty happy and chasing other fish around, so not dropsy I wouldn't think). Presuming she's fine but conditions are not ideal for her, will she eventually have to give birth or will she re-absorb the babies?
The pH of my tank is always on the low side (6.8), maybe this is what's causing her to hang onto the babies.

 

Hello, @hhawarden - what kind of molly is that? She doesn't look "pregnant" - we call it gravid - when a molly is heavily gravid they look like little boxes - really square around the back end and in addition, a gravid spot is always visible - a black mark around the anus area.

Do you have a male molly?

 

Thanks Tracy,
i do have a male Molly but I thought she was gravid (ahem) when I got her. If she isn't,why is she so fat?
i can't see any black spot around the cloaca.
thanks,
Hugh.