The Sitter by Kelly Addams

Alison is a good sitter, the kids like her... everyone likes the happy, pretty teenager. She has an easy going temperament, so when lawyer Janet has to travel for work it is automatic that Alison will be called in to handle her kids, what Janet doesn't know though is that her husband Tom also as a little job for the sitter, and it certainly has nothing to do with keeping the kids happy.