Eighteen year old Gwen has made out with enough boys to teach her a thing or two about sex. But now she wants to know what it's like having a man sliding between her thighs, not an unexperienced boy. She carefully schemes to get Alan, the father of the two children she regularly babysits when Alan and Celia go out on business functions together, alone so she can show him all she's learned and prove to him how much a woman she's become. Everything goes smoothly and Alan comes home without his wife to find the babysitter not only waiting for him, but eagerly anticipating what she has planned for the two of them. Then his wife returns home before they get a chance to finish and the scheming changes, with an added element of being caught in their illicit love-making involved.