The perfect relationship between Quinn and Finn has slowly fallen apart over season one of Glee. He's not even her baby's daddy!
Added:
Their names rhyme. That makes Finn and Quinn cute or annoying, depending on your viewpoint.
Added:
Quinn Fabray is played by Diana Agron on Glee. She's a spunky, cocky cheerleader.
Added:

Glee Quotes

I had sex with you because you got me drunk on wine coolers and I felt fat that day. But it was a mistake.

Quinn [to Puck]

Artie: I thought I was over someone, but I still think I have feelings for them.
Brittany: The Clintons?