Two ideas:
(1) After the wedding, parents of the groom and parents of the bride meet back at house (groom's parents had to travel some
distance and are staying overnight). Thinking about their children's wedding night gets them hot and bothered (they also have had a little too much to drink). One pair begins dancing with spouse; other pair watch and then start to make out on couch. All become aroused. Dancing husband suggests to wife that they retire to bedroom; she surprises him by saying, "No...let's do it here." To cut to the chase, inlaws begin by making love to spouse; at some point it becomes a swap.
(2) Honeymooning couple meet parents of bride who are vacationing in same region (maybe a better premise here...parents have to deliver something their daughter & new husband left behind; they decide to stay overnight at resort and leave in the morning). The two couples have get a little tipsy; Mom and Dad start trying to show the youngsters that they still have it (playfully); at first embarrassed by her parents, Daughter decides she will not leave the room and begins kissing husband.
[At this point it will take an incredibly skilled writer to credibly describe the escalation from playful teasing to the couples having fullfledged sex in front of each other. Even more skill required if a threesome develops between Dad, Mom, & Son-in-Law (unless daughter passes out); Most Advanced Writing Skills will be required to make a full swap involving Mom/Son-in-Law and Dad/Daughter credible. Any takers?]
Of course, scenario 2 would also work with groom's parents, if that makes any difference.
(1) After the wedding, parents of the groom and parents of the bride meet back at house (groom's parents had to travel some
distance and are staying overnight). Thinking about their children's wedding night gets them hot and bothered (they also have had a little too much to drink). One pair begins dancing with spouse; other pair watch and then start to make out on couch. All become aroused. Dancing husband suggests to wife that they retire to bedroom; she surprises him by saying, "No...let's do it here." To cut to the chase, inlaws begin by making love to spouse; at some point it becomes a swap.
(2) Honeymooning couple meet parents of bride who are vacationing in same region (maybe a better premise here...parents have to deliver something their daughter & new husband left behind; they decide to stay overnight at resort and leave in the morning). The two couples have get a little tipsy; Mom and Dad start trying to show the youngsters that they still have it (playfully); at first embarrassed by her parents, Daughter decides she will not leave the room and begins kissing husband.
[At this point it will take an incredibly skilled writer to credibly describe the escalation from playful teasing to the couples having fullfledged sex in front of each other. Even more skill required if a threesome develops between Dad, Mom, & Son-in-Law (unless daughter passes out); Most Advanced Writing Skills will be required to make a full swap involving Mom/Son-in-Law and Dad/Daughter credible. Any takers?]
Of course, scenario 2 would also work with groom's parents, if that makes any difference.