My childhood friend's sister and I are dating her younger sister. One day, I visited her house and her older sister, Konan, came up close wearing no bra. I hadn't realized it before, but it turned out she had massive breasts. Her nipples were clearly visible through her braless camisole, with areolas slightly peeking out, looking incredibly erotic. Unable to resist, I started groping her breasts, secretly enjoying her large, soft tits. Overwhelmed by her H-cup seduction, I ended up crossing the line.