Yep, I'd say pregnant too. It's always hard to say how long they have, I have one that gets enormous long before she drops and another that doesn't get very big at all, lol. I would guess yours has a week or so personally.
Well, that is a gravid spot on your female Sunset Variatus. I'm not sure she's all that far along, as they often show the dark area even if they aren't pregnant. I don't know how big variatus females should get, I just realized I've never had the species. I believe they can drop fry about every 4-6 weeks, so it can't be much longer than that!