My boyfriend, who was living together, went back to his hometown and I was left with pent-up sexual desire. The neighbor's older sister, who was always masturbating every day. I was listening to her masturbation sounds through the thin wall as usual when she suddenly spoke to me. 'Hey, you're listening, right? I won't cheat, so watch me or help me masturbate.' That's how I started helping her with her masturbation life. With my fingers! With a vibrator! With a real penis! The neighbor's older sister mixing the white viscous fluid! A woman's masturbation is more intense than a man's!