Me and smoov (onlyfans.com/smoov_bxtch) did a custom! A husband and wife, who were having issues with their sex life. The wife finds the husband's porn while he's not home, and some is taboo. At first she's disgusted, but can't stop thinking about it and the idea of her husband being with his sister, who she's always found attractive. She's fascinated by how wrong and dirty she thinks it is, and finds that for some reason she gets incredibly turned on just thinking about it. She invites the sister over to talk with them, and after a few driinks proposes the idea to her husband and his sister. She wants to watch them have sex. They're reluctant, but she convinces them that it will help the marriage. POV simulated sex on a bed. One being the sister with the husband. The other is the wife, who is nude to the side masturbating while she watches. She encourages them the entire time, telling them how dirty it is, how wrong it is, and how wet she's getting, etc. She occasionally plays with the sister, kissing her, touching her breasts, etc. The sister starts out reluctant, but by the end is begging her brother to fuck her harder and to cum inside her. All orgasm together.