Russian girl cheats on her boyfriend behind his back

There is no limit to the insidiousness of a Russian guys girlfriend. Having presented a friend with headphones to listen to her favorite music, she lets the gentleman into the apartment, whom she then lets into herself in the hallway. But what can I say: there is no forgiveness for the treachery of a cheater, especially since everyone can be in his place ... or maybe in the place of a lover, which radically changes the whole picture! ...