As the film's title suggests (Long Happy Days with Sister-in-Law), the younger brother-in-law is extremely happy and content to have had a long period of time to have sex with his beautiful sister-in-law.SOE-936 The long joyful days with my sister-in-law The content: For this type of illicit affair between the younger brother-in-law and sister-in-law, the only reason is that the husband is impotent, as always, rarely is the storyline about a bored wife wanting to have an affair.
