Martina

Martina is a relative from Susan's side. She was having a buffet at a hotel when she saw more food on another side, so she went there but she didn't realize it was a full-length mirror, and crashed into it. She sued the hotel, and since there was a Porsche at Gramma's house, Greg believed it was hers.

Appearances

 * Diary Of A Wimpy Kid: Hard Luck (First and only appearance)