The Boyfriend

Lydia Martin has an attitude ending up in boy's beds.
But when she tries to flirt with an older family friend her mother starts making strict rules, so she tells Lydia that if she doesn't find an actual good guy and boy-friend she won't be able to leave her house.
Lydia hates the idea of finding someone to have a real relationship with, so she pays Stiles, a random geek in her school to fake a relationship with her.