Ever the patriarchal father-in-law does his best to support the stepson’s interest in the Girl Scout stepsister

A boy who married a Girl Scout has an erection when he sees her stepsister and wonders what his father-in-law would say if he told him of his intent to rape this stepsister. The supportive dad-in-law encourages him, and things turn down hot in the tub resulting to intimate s*x.