Patrice Tierney, wife of Rep. John Tierney (D-Mass.), has agreed to plead guilty to charges connected to her brother, the Associated Press reported Tuesday night, citing federal prosecutors.

Patrice Tierney, 59, is expected to plead guilty Wednesday in U.S. District Court in Boston to four counts of aiding and abetting the filing of false tax returns related to her fugitive brother, Robert Eremian, the AP reported. He is accused of operating an illegal offshore gambling business.

Prosecutors say she managed her brother’s finances in the United States and mischaracterized his income and job to his tax preparer.

The Congressman said in a statement that he stands by his wife and that she believed the money was from selling or licensing software to legal Internet gambling businesses. “Patrice has acknowledged and agreed that she should have done more to personally investigate the true nature of Mr. Eremian’s business activities in the course of carrying out his requests in paying his children’s household expenses, family medical bills, and his personal bills and taxes from a checking account in which he deposited funds,” he said.

Patrice Tierney could face time in prison. John Tierney is up for re-election, but his seat has been considered safe.