User blog comment:Lightening McQueen/Cars theories/@comment-3438245-20121107232912/@comment-5194340-20121212210122

By the way, also about families, Mia and Tia are sisters, as it is stated in Cars Toons: Mater's Tall Tales, most notably in Mater Private Eye. As they look the same, they are twins, which it is also stated they are twins, including in the first film when Chick Hicks tells McQueen about that now they are his biggest fans, only before they became McQueen's biggest fans again after Chick rammed the King off the track and caused him to crash, which McQueen then pushes the King to the finish line.

And also, I do agree with you, Gray Catbird, that it is possible for cars to marry, because we know that Ramone and Flo are husband and wife, as well as Van and Minny.