She wants to make the plumber horny.

The woman is a slut, and likes to show pussy to strangers in uncomfortable situations. The plumber is going to make an arrangement and the woman looks for all the situations that allow her to show her body to the plumber. But it does not incite him to anything, she wants him to think that it is casual, that he is only lucky to be able to see her without her knowing. A pervert who at some point is going to fuck her pussy and ass to show her that it is not right what she does.