The details are, as always, superb! Nobody does details and finishing touches better than Mighty Art Lord Kerem Beyit!
However, I feel like the gross anatomy of the twin on the composition's right is off. It seems like you've slid the features of the chest to the right (again, the composition's right, not the character's right) so that her torso seems twisted and distorted. It's especially notable on the character's breasts, which look like they're escaping to the right. The character's left breast looks like it's in the middle of her chest, because my eye moves from her face, down to her shoulders (which are almost straight on judging by how much of them we can see), to the breasts (where the issue lies), to the lower rib cage (where it's clear that you intend for the character to be twisting).