You can't leave some girls alone with other guys or you run the risk of them getting fucked like real sluts. Tell that to this blonde's boyfriend, who, when she's alone with the guy's roommate, can't resist taking his cock in her mouth.
The one who tempts her is the roommate, who takes out his dick in front of her and starts jerking off. The blonde goes for him and sucks him off in the most vicious way and then they start fucking on the table in all kinds of positions.
They take advantage of the fact that they're alone and have such a brutal fuck that the slut is probably wondering whether to leave her boyfriend and get involved with this bastard who has fucked her so well.