Mother-in-law incest fake marriage, eating mother's stepchild

Hikari met Shinji, her future son-in-law, for the first time at the dinner table where her husband proposed marriage, and fell in love at first sight. Since then, Hikari has become obsessed with Shinji. And Hikari's life with Shinji, who she even got into a formal marriage with, transforms Hikari's obscene fantasies into reality...