"Mother's son will stop teasing her, so let's sex until she gets tired of it." the mother who is the mother of the mother-in-law is the bullying sex of the bully

A son who had an affair with his parents on the edge of ijiki brought a school friend a day. However, this friend was only an idiot! In fact, the mother who was aware of the fact that her son was in an emblementine told him to stop ijiki, and talk to the idiot, "I would like to stop my aunt's son, but let me have sex instead." Unexpectedly mother accepts the idea of a kid and sex with the idiot! I feel disgusting...