Who is Megan Murphy from Thanksgiving and what is their importance?

Megan Murphy is twenty-seven-years-old. She is in the midst of recovering from a broken relationship. She was briefly engaged to Steve as a senior in college, and her next relationship was with Dave, though Megan says Dave had fallen in love with her parents rather than herself. After her break-up with Dave, Megan moved to Williamsburg, a historic town that is a major tourist attraction for those interested in history. She meets Patrick Hunter in Williamsburg.