She lives in a two-generation house with her husband's mother. In her daily life, she is always thinking about her mother-in-law, which causes stress, and her nighttime activities have decreased drastically because she is worried about her mother-in-law sleeping next to her, separated by a single sliding door. With such frustrating days continuing, the occasional sex she does have feels so good that she is on the verge of screaming! But she is unable to make a sound. So she bites the sheets to endure. This is the reality of a two-generation house.