Dalmatian Molly Issues

[bakerykid]

Hi I'm new to the whole aquarium jig and I got two dalmatian mollies yesterday. (The guy at the LFS said I should get them in pairs.) anywho, one seems way fatter than the other and she stays up in the corner of my tank hiding behind the filter bubbles most the time. && the skinnier of the two looks like she/he [I think it's a she] has a hunchback and likes to hover low, really close to the gravel. Can anyone tell me what's wrong with my new loves? If in fact anything is wrong? or am I just worrying too much?

 

[bakerykid]

This is my fatty

 

[Mzsunshine99]

She looks prego like mine

 

[bakerykid]

really?? how pregnant is she? can you even tell? what should I do? && what about the skinny one? she looks off doesnt she? or is that just me? the only way i can think to describe her is hunchback. .