Three years after moving into her husband's family home, Tina gets along well with her father-in-law and wants for nothing. Her only frustration is sex with her husband: his insistence on efficient baby-making leaves their mechanical, loveless sessions deeply unsatisfying. Her pent-up desire keeps growing until one day she secretly masturbates in a frenzy, unaware that her father-in-law is watching. That discovery begins a routine in which he creampies her after every attempt she makes to conceive with her husband.