Jeremy's Mom invited her old friend Miranda round to stay while her husband was away on a golfing trip, and it turned out she was super hot! She was also very, very flirty which was pretty much a dream scenario for a fifteen year-old boy.
Meeting in church two young couples become friends and establish a swinging relationship. While looking for an apartment that will make their relationship sustainable, they meet a widow who was involved in a swinging relationship with one of the wives' parents (See All for One and One for All). On their third Christmas, the couples visit the wife's parents where they pursue a familial swap. Before the holiday is over the widow joins the couples and the parents in a swapping party.