"It's only once..." While my wife was away, I secretly had sex with my stepmother for 3 nights and 4 days.

Yusuke ends up living alone for a while on his wife Kaoru's long business trip. Then her stepmother, Sayako, who was asked by Kaori to take care of him, visited. Unlike his wife who is busy with work, Yusuke is aroused by Sayako's kindness and mature body, who is a homely person, and asks her to take care of her sexually... Unable to contain her son-in-law's strong cock, Sayako makes him ejaculate as if to be swept away. However, the aching body, seeking pleasure, destroys rationality and easily crosses the forbidden line...