Is it just me or is her right leg bending at an impossible angle?

Bad anatomy strikes again. And on such a nice image too. ffs.

I think that's either A. her sock or B. an actual error.

Actually if you mean the dangling boot, that's her left leg and its just the boot being half off that makes it look odd.

It's both of her legs.
They aren't connected to her hips.

Oops..was not even looking at her hips, as i thought it was the half on boot that was problem...Hmm...rubber lass? lol

Virtual Idol = Virtual joints

Thighs and butt are definitely erroneous.

i think the dress isnt just as low as you fuckers are used to... could be wrong tho

Look at where her hips are - on the seat cushion.
Look at where the joint between her hips and right leg is - on the top of the armrest.

That's an anatomically impossible distance.