"Does rubbing my penis with my hand not count as cheating?" I stayed in a hotel for three nights, and my girlfriend's sister gave me a devilish masturbation session, making me ejaculate 18 times. In the end, I was cuckolded. (Tono Karin MIDA-349)

I originally thought my girlfriend's younger sister, Karin, was an honest girl, but I never expected her to be a hidden pervert... "Playing with her doesn't count as cheating," I inexplicably believed her. Even though my girlfriend was sleeping right next to me, I still came to orgasm from Karin's honey trap handjob... This is a story of multiple ejaculations with her devilish expressions and techniques until my testicles dried up, and of having crazy sex with her sister...