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When I met my girlfriend's sister for the first time, she was a J-girl athlete on the track team, and her big breasts, which didn't match her healthy, toned body, were very attractive. When I talked to her, she told me that her big breasts got in the way when she ran. When I mentioned a "massage that can make breasts smaller," she seemed interested, so I went ahead and performed the treatment. When I rubbed aphrodisiac oil into the big breasts of my innocent, unsuspecting sister, her breathing became heavy and she started to sweat. I carefully massaged her breasts, which reacted with a flinch just by touching them, and when I touched her nipples, she arched her back and climaxed. When I relentlessly kneaded and twisted her nipples, she became a premature ejaculator who could orgasm from nipple stimulation even with the slightest stimulation! I rubbed her breasts, which were bigger than my girlfriend, and came inside her many times!