She’s smiling and sitting back to watch, but something tells me this isn’t going to be the conclusion of the proceedings. It looks like she’s got him into a good position and is relaxing for a few minutes, enjoying his struggles as he vainly tries to find a comfortable position. Before too long I suspect that she’ll be looking to explore all the other tortuous options that this kind of vunerable position affords.
I’m afraid I don’t have an original source for this. I found it on the Eager to Please tumblr site.