Although she is a very ordinary mother of fifty years old, she couldn't stand the sexual desire that became stronger as she got older, so she used a matching app to find an affair partner and repeated unfaithfulness. The son who feels distorted excitement by such mother's actions asks questions and devours the body. The fifty mother who is groped by her sensitive nipples and wets her crotch eventually spouts a large amount of tide and ascends many times. The mother who finds the best partner called a son invites Ji-ko to a ripe ma-ko with an ecstatic expression.