River Lynn has invited her best friend Gal Ritchie for one of their regular slumber parties, having set up some blankets and pillows on the living room floor. River's stepmom, Annie King, pops in and is delighted to see Gal. After chatting for a bit, Annie wonders if she can join them for the evening. River and Gal eagerly accept, and Annie crawls under the blankets with them. Later that night, however, River is shocked to catch Gal hooking up with her stepmom under the sheets! Not only that, but it turns out they've ALSO been having an ongoing affair right under River's nose! Not to worry, however- River knows the PERFECT way for Annie and Gal to make it up to her... by turning their sneaky snuggles into a sexy threesome!