Mamoru is invited by her mother-in-law, Yui, to go shopping. A body in close contact inevitably in a packed train. She is conscious of the beautiful Yui and her lower body gets hot every time the vehicle shakes. Her erect cock sticks in her Yui's crotch. Yui, who thought that she would get angry about it, unexpectedly started squeezing Ji Po, saying, "I haven't done it recently...". Even though she refuses on the train, she is fucked by her Yui in the toilet at the next station. And her big cock can not be forgotten, and her Yui will also ask for it at her home.
