When a twenty-something college boy comes home for a visit to meet his Dad's new fiancee, he's prepared for small talk, a nice dinner, and pretending that he has career goals. What he's not prepared for is recognizing his Dad's radiant bride-to-be as the woman he's been subscribed to on an "adult" fan site. Awkwardness ensues as the two navigate family loyalty and an undeniable sexual attraction in The Stepmother 18.