Obviously, the thing that bothers you is that she is making it very clear that she is initiating sex for your benefit. She is willing herself to have sex with you. She isn't wanting to have sex herself. Either you need to appreciate that she is LD and that is all she can do given the fact that she doesn't actually want to have sex with you or ?. I haven't figured this one out myself. I'll be curious to hear what your MC has to say.
Please remember that you are not despicable for posting to this BB. You may help others if not yourself.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver