MIAB-545 - "Leaking isn't cheating, right?" The story of being trained through ruined orgasms by my girlfriend's gyaru sister after asking for sex advice.

My gyaru sister Amiri found out I'm struggling with sex with my girlfriend! She jumps in for fun, teasingly saying, "Let me see your cock lol." She pushes me to the edge of ejaculation but refuses to let me finish, leading to a pathetic 'leaking' orgasm. "It's not cheating if it's not a full ejaculation," she tempts. Kept erect just by nipple stimulation, I become addicted to the agonizing pleasure of being unable to release.