The sister-in-law ends up sleeping with her husband and brother-in-law. The next morning, she wakes up to find that her brother-in-law has morning wood. The sister-in-law, who is not satisfied with her husband's small dick, compares the two dicks and reaches for her brother-in-law's big, attractive one, giving him a handjob and a blowjob. The sister-in-law can no longer control herself and gives in to her desires by straddling her brother-in-law's dick and inserting it.