American Dad!: Adventures in Hayleysitting

The Smith family’s regular babysitter, Lindsay (guest voice Alison Brie), breaks her leg in a soccer match, so Stan and Francine are forced to leave Steve with Hayley, despite her track record of being extremely irresponsible.

When Hayley teases Steve about being a goody-two-shoes, Steve is determined to prove her wrong and sneaks out of the house to go to a party with the cool kids

Source: FOX