My wife's mother ran away from home due to a marriage fight

Miki, a stepmother who runs away from home, suddenly comes to surprise her daughter, Yumi and her husband, Seigo. That night, Seigo and Miki were enjoying a drink alone... Miki, who becomes a kisser when drunk, forgets that she is her daughter's husband, and can't hold back, she sighs Seigo's lips. Furthermore, perhaps because she had been building up due to her daily sexlessness, she forcefully pushes her down and gets on the horse and gets violently furious. The next morning, Miki behaves naturally, perhaps as if she doesn't remember, but Seigo, who hasn't stopped being excited last night, is left alone...