In this video, Sailor Fuku-clad Ai Ueno plays her role as a sister-in-law exceptionally well! Her innocent yet provocative actions leave her older brother feeling both bewildered and aroused by his little sister's blatant sexual advances. As she teasingly reminds him of their childhood doctor game, one wonders if he can resist her seductive charms? Is she trying to seduce her big bro into some naughty fun? The question remains... how far will his resistance hold out against her irresistible allure?