After 15 years of marriage, the relationship between Uno and his wife gradually cooled down, they had not had sex for a long time. At this time, Uno's nephew, Yuki, came to Tokyo to prepare for the university entrance exam, so he wanted to stay at her house for a few days. He had not seen Yuki for a long time, and now he had grown up and was extremely handsome. Determined to pass this year, Yuki had to restrain himself and not masturbate for a whole year. But that determination quickly collapsed when he saw his aunt's plump and seductive body. Uno's image kept appearing in his mind, his cock was always erect, making it impossible for him to concentrate on studying. Uno accidentally saw him masturbating, Yuki had no choice but to tell her the truth and ask her to masturbate for him. Uno agreed because she loved her nephew and wanted to help Yuki concentrate on studying. She used her hand to help him ejaculate, but after a while, Yuki's cock became erect again. Especially when he saw Uno practicing yoga, he could not stand it anymore and rushed to release his sexual desire! Because she hadn't had sex for a long time, Uno was extremely sensitive. Yuki's every thrust made her body tremble, constantly letting out moans of pleasure. And during the entire time Yuki was here, he continuously made love to his sexy aunt, releasing all the sperm he had restrained and accumulated for the past year inside Uno!