The Babysitters (2007)

At 17, brainy high-school junior Shirley Lyner is thinking about the future and works part-time as a babysitter to save up for college. Shirley has always had an innocent crush on Michael, one of the dads she regularly sits for, but one night, one thing leads to another, and before long they're having a fully-fledged affair. Bingo! She reckons she's found the way to fund her way through college - running a babysitting service - with extras. Soon, she's providing teenage call girls to the dads of young children. Shirley can be ruthless, and tension builds when some of the clients overstep the mark. Then, one of the girls tries to freelance... it's only a matter of time before Shirley's carefully crafted cover is blown.