[GS-448] My brother's girlfriend is a pervert who gets excited when she's being cheated on and is a huge fan of eroticism. It's just the two of us while my brother is away. We were having a normal conversation, but suddenly the room fell silent... We both suddenly became aware of each other and she was nervous and fidgety. Seeing her panty flash from the gap in her miniskirt... her wet lips... being caressed by her erotic thighs...