A bf/gf couple watches a married couple living in a building across the street have sex and the photographer husband fucking several of his female models. In the end, the boyfriend finds out through his binoculars that it’s his girlfriend’s turn to get fucked by the husband.
A new guy in an apartment complex is given a blowjob by his hot neighbor after dining with her. Prior to that, she liked flirting with him despite having a boyfriend.
A chick starts hanging out and going to dinner with her neighbor even if she has a current boyfriend. And on the first day of her perceived break-up with her bf (she couldn’t contact him), she immediately drinks and makes out with the guy in his place.