Bound by a deep connection, a sister and her younger brother. To take care of her younger brother who is a graduate student, the husband agreed to live together. Such a husband is a salesman and often away from home, and he will be on a business trip for the next three days. At that time, the sister…! Mistaking her younger brother's erection for her husband's, she has sex with him at home and he ejaculates inside her! Thick semen fills her vagina. 'Let's have sex again while he is away,' says the sister... Were you not drunk?
