The day I finally visited my girlfriend Ai's house, I was drawn to her beautiful voice and peeked inside—only to find her big-titted older sister, Fumika, rehearsing lines. I couldn't help but stare at her deep cleavage, and before I knew it, she noticed: "You've been watching this whole time, haven't you?" Then she teased, "Do you want to touch?" Before I could react, my cock was trapped between her heavy, soft breasts—so much fuller and more intense than Ai's—and I erupted instantly. Hidden from my girlfriend's sight, I was sucked, milked, jerked off, and pounded in tit-fuck sex as she made her massive breasts bounce. Even though I knew I shouldn't, the incredible sensation of her big tits overwhelmed me, making it impossible to resist.