Considering her with legs, how is her lower-half going to be positioned? Looks like the bottom half of her body is going to be very slanted to where she'd fall over, looking at her dress. I think the elbows should go lower down seeing as one section of the arm is shorter than the other section for both of them. Also, her neck looks lopsided maybe rather than centered on the area where her shoulders are?
Just thinking out loud ^^; Hope I might've helped!
EDIT: Shoot, I didn't notice that you were only talking about the arm >U>; Er, nevermind the rest, I guess.