A new very tricky Challenge for Yvette

We got a Mail, that our Models can escape from their Bondages to often. So for me, it should be a fair Competition between Rigger and Model. It is easy to tie a Model that she is not able to escape, but it is not easy to give her a real hard challenge and make it possible for her to escape if she fights really hard. And also, I always try completely new positions and experiment a lot. So sometimes it is easier for the models, sometimes they have to fight really hard. And sometimes it is impossible to escape from my ropework...