Maurlene

Maurlene is Grandpa's girlfriend and only appeared in the Diary of a Wimpy Kid Online version of Diary of a Wimpy Kid. She was replaced by Darlene in Hard Luck.

She accidentally left a pair of her underwear at Greg's house when she and Grandpa Heffley babysat Greg and his brothers for the weekend. Until they were revealed to be hers, Greg's mom found them and briefly thought that her husband (Greg's father and Grandpa Heffley's son) was having an affair with another woman.

Trivia

 * She slightly resembles Isabella.