You're really stepping up your game! Just proves that even if you lack talent practise makes perfect.
Just kidding.
Red string looks a bit too straight for me at first glance it looked like a random red line. BUT that might be because I'm using my phone at the moment zooming in makes it look better already.
I think the clothing at her cleavage looks amazing and the overall colortheme is awesome aswell!
Also, awesome string reflection in her eye, although the one in her left eye (right one in the picture) looks a bit off.