This one is a twist on the usual blackmail scenario. There is a married couple where the husband husband is the one being blackmailed by another man. However, the blackmailer is requiring the husband to convince his wife to become the blackmailer's sex partner or slave because the husband has a hidden fantasy of becoming a cuckold. The husband cannot reveal that he is being blackmailed. The story progresses until the blackmailer can waltz into the couple's home at any time and fuck the wife right where he finds her whether the husband is watching or not even if they have visitors/company. One of the blackmailer's requirements is that the couple does NOT divorce.
Twist One: The couple has a son, 16 or older. The blackmailer gets the him to play with his mother until either male, blackmailer and son, can fuck the wife in front of the husband. The son is to not know about the blackmail and is only convinced to play along by his father.
Twist Two: The couple has a daughter, 16 or older. The blackmailer gets to use the daughter just like the mother until he can fuck either female whenever and wherever he cares, even if the father and/or her boyfriend is present. The father is to convince his daughter and her boyfriend to allow whatever liberties the blackmailer wishes. The boyfriend will not be allowed to join in, just watch.
Twist Three: Combine Twist One and Twist Two, with the son and blackmailer being able to use either mother or daughter.
In any scenario, only the husband knows about the blackmail and is the only one pressured to convince the others to play along. Depending on your preferences, this could include interracial, pregnancy, and/or bestiality as well. It will not include any other partners that have not already been mentioned. I will be playing the blackmailer while you will play the wife and/or daughter. The husband and/or son can be played by either depending on your preference.