A voluptuous big-breasted sister and her hard-as-nails little brother who loves her go on a hot spring trip together. The sister, who is curious about women's bodies, gives him a gentle lecture and uses her dynamite body to give him plenty of H action. The sister overflowing with maternal instinct has a brother whose dick is harder than ever. The sister also faints and comes from her brother's hard pistoning. A sister who reaches the peak of ecstasy in various places like open-air baths or hotel rooms—I want a sister like this!
