Rob Schneider's mocking Lindsay Lohan upsets Mom

Dina Lohan is upset over Rob Schneider's mocking Lindsay Lohan on the Tonight Show with Jay Leno Tuesday, PEOPLE reports.

"We have a great respect for Jay Leno but we are disappointed in the path he chose to allow a guest to make light of a very serious situation concerning Lindsay," Dina told Access Hollywood's Billy Bush in an e-mail Thursday.

On Tuesday, Schneider replaced Lohan, who canceled her scheduled appearance after she was arrested on drunk-driving charges. Schneider dressed in drag as the actress, complete with blond wig, black dress and an alcohol-monitoring bracelet strapped to his leg.

"This is a very personal and private matter and our only concern is to get Lindsay the help that she needs," Dina adds in the e-mail. "We will get through this together and it will make our family stronger."