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Reese Witherspoon, Jim Toth

Kevin Mazur/VF11/WireImage

Reese Witherspoon and Jim Toth haven't completely moved past their run-in with the law last Friday.

Although the Oscar winner apologized and took full responsibility for having "one drink too many," a source tells E! News the mom of three is still "incredibly embarrassed and upset about the whole thing."

"She also has a lot of explaining to do to her kids [Ava, 13, Deacon, 9, and Tennessee, 8 months] as well," adds the source. "She prides herself on setting a good example and being honest and open with them. She made a big mistake but she is owning up to it and will learn from it."

As for her CAA agent hubby? "Jim feels guilty about what happened and that Reese got involved in this mess," says a source. "He knows that she is a public figure and how important her image is. He wants to help her move past this and for people to forget about it."

"This is a bit of a wake-up call," adds the source. "Jim has always been quite social and it might be time to slow down a bit, especially now that they have a baby."

Hopefully that leaves her plenty of time to reflect and move forward. (We all make mistakes!)

The spouses are both due back in court next month.

—Additional reporting by Marc Malkin