She is focused on she knows you want sex. She is focused on that she doesn't think she should have to give it just because you did x, y and z for her.
You have to look at it from her perspective to understand what you are dealing with.
I can see the logic. If you have no sexual desire yourself, then you would see it in those terms. "He does this and that for me which he presumably wouldn't do if he wasn't trying to guilt me into sex which I wouldn't do otherwise."
It reminds me of an article about sexless marriages some years ago in a well-known magazine. It described how modern women felt much freer than their mothers to have sex whenever and with whomever they wanted in college. But by the same token, unlike their stay-at-home mothers, modern women today who are dead tired after juggling a job, kids, chores, not to mention a sex-crazed husband, don't feel they should have sex unless they jolly well feel like it.
