Living with her daughter and son-in-law, Kaoru accidentally discovers that her daughter's marriage is sexless. Feeling sorry for her son-in-law who seems lonely and her daughter who is not embraced, Kaoru realizes that in fact, her son-in-law has been strongly aroused by Kaoru, who shakes her large breasts in front of him! Unable to resist her unsatisfied body to her son-in-law's intense courtship, they end up building an immoral relationship under the same roof...
