She knew that she was giving him a nice view up her dress.
She knew he was sitting there trying to look up her dress without being too obvious.
She knew that in roughly an hour that he'd be in her panties, on his knees begging to suck her big black strap-on.
She knew that he'd be walking funny for a day or two after she took his ass and fucked him all night long!!!!
He knew that she seemed interested and he hoped he might get lucky.