She sits opposite you, and looks at you as you try to control yourself...
You have tried not to treat every woman as if she were a sex object, really you have! But this one is such a sexpot! And the way she is dressed!
You can't help but notice her feet and legs, which are so alluringly displayed for you. The open-toed high-heel shoes. The white fishnet stockings. And it doesn't help that you can see the top of one of her stockings under her short mini-dress as she sits and looks you over appraisingly.