Just an update to this situation...
What I basically did was call her out on the fact that she did not have any self control that all she wanted to do was fvck. She kind of got upset, but then she thought hard about it, and decided that she really didn't have any self control. The night I told her this, I said that we are going to fvck on my own accord and when I want it, we will have sex. It worked as she was more horny when we actually did get around to having sex.