HUNTC-148 She's super serious at work but incredibly lazy at home. Sister reaches explosive orgasm with little brother's virgin dick! Sister takes little brother's first time... This situation is somehow perverted...

My sister, who lives with me, is a career woman working at a major trading company. Although she's serious about her job, she's incredibly sloppy at home! Every day, she drinks alcohol in a half-undressed shirt, a shameful sight! I don't know where to look when I see her like that. When I point it out, she mocks me by saying, 'Is this too stimulating for you, virgin boy?' However, seeing my erection, my sister gives a lewd expression and says, 'Taking my little brother's first time... This is kind of a perverted situation.'