GVH-488 _The prostitute went to her father-in-law's room every night

Tsukimi Iori and her husband have been married for a while. They are living with her 80 year old father-in-law. Iori loves her husband very much and is filial to him. However, one thing that makes Iori not very happy is that her husband's cock is fading very quickly. Even though Iori is very beautiful, his husband seems helpless. Moreover, her father-in-law really wanted to have a grandchild, so Iori was really awkward, so she quickly told Yamada's father-in-law about it. Yamada has a close friend, his son previously had the same problem as Yamada's son, so he called his old friend to ask for tips. Through his old friend's words, Yamada learned that he used rocket for 1 hour to make his bird hard for a long time. Yamada decided to go to the shoppi to buy some for his son. However, before letting his son use Yamada, he was a bit skeptical about the quality of this product, so he tried it and then...