The wife of U.S. Rep. John Conyers has less than 30 days of freedom before beginning a 37-month federal sentence for taking a bribe as a Detroit City Council member.

Judge Avern Cohn on Tuesday denied bond pending Monica Conyers' appeal of his refusal to allow her to withdraw a guilty plea on the day she was sentenced.

Cohn's order says she "shall report to the institution designated by the Bureau of Prisons" on Sept. 10.

Conyers already won a delay until that date to help a relative with medical needs.

She pleaded guilty last year to conspiracy to commit bribery and admitted taking cash to support a sludge-hauling contract.

It's unknown when a federal appeals court will hear her case.

The Associated Press left a message for her lawyer.