San Luis Obispo County Supervisor Bruce Gibson’s wife, Dr. Grace Crittenden, has filed papers to dissolve their marriage — less than two weeks before what would have been the couple’s 34th wedding anniversary on Jan. 27.

In the brief document, filed Jan. 14, Crittenden cited “irreconcilable differences.” She did not spell out what they were.

Gibson, 60, caused a furor when he announced on Nov. 16 that he had had a long-term affair with his legislative aide, Cherie Aispuro.

Gibson and his wife separated Nov. 11.

The affair galvanized county political observers, many of whom asked whether he had Gibson had broken the law or violated a policy against having a relationship with a subordinate.

The county counsel cleared Gibson on both counts. However, the supervisor moved Aispuro, 52, out of his office and into a temporary assignment in the Clerk-Recorder’s office.

Last week, after Aispuro had spent six weeks with the clerk-recorder, Gibson moved her back to his office, which caused another uproar. He said she was the best person for the job, and both signed legal documents saying they never would sue the county.

Many people believe Gibson, widely regarded as highly effective on the substance of his duties as a supervisor, has lost credibility because of his personal behavior. He has not said whether he will run for re-election when his term expires next year.

In the court document, Crittenden, 65, alluded to community property and assets but did not go into detail about them. Lawyers will sort that out later, the papers say.

Crittenden is also asking that Gibson pay her attorney’s fees.