My wife, a career woman, has been away on a long business trip for a week. I can't take my eyes off her mother Yuri, who came to look after me instead, because she has huge breasts that are just my type. I decide to peek at Yuri's body, wanting to see her exquisite breasts, but what I catch a glimpse of is Yuri's obscene behavior as she masturbates. I get caught peeping because my breathing gets heavier as she shows me her body, which is much more voluptuous than I expected, but when she invites me to come in with her, I can't refuse...