Emiko Koike masturbates while thinking about her step-son

Emiko Koike got self-conscious and started exercising to keep her mature body tight. After catching her step-son sexually watching her during exercise she has been having trouble sleeping. She especially has troubles late at night, when her husband is working overtime and has no time to come and please her horny body. In order to keep herself satisfied she started regularly masturbating. Somewhere...