HAYWARD (AP) — The wife of state Treasurer Bill Lockyer on Friday said she was resigning from Alameda County's Board of Supervisors following a string of bizarre public incidents she has blamed on her own chemical dependency.

Nadia Lockyer plans to resign so that she can focus on raising the couple's 8-year-old son, Diego, she said in a letter to colleagues and constituents.

"Today, for my child ... I hereby announce my resignation from the Alameda County Board of Supervisors, in order that I may focus on the well-being of my child, recovery from chemical dependency and interpersonal violence, and transitioning to work in the private sector," she wrote.

"I got myself in a place called addiction all by myself. A decade of non-stop trauma, pain, and loss are my personal excuse."

The 40-year-old Nadia Lockyer's public troubles began in February, when she claimed she was assaulted by an ex-boyfriend, Steve Chikhani, in a Newark hotel room.

Nadia Lockyer said she met and began an affair with Chikhani at a rehab facility in 2010, according to the San Jose Mercury News, within a few weeks of her election.

Most recently, an email sent from her account to a Bay Area News Group reporter claimed her husband had given her drugs. Bill Lockyer's office denied those allegations.

The troubles have put Bill Lockyer, a former state attorney general, in an uncomfortable position unlike anything he has experienced in four decades as a state politician.

Bill and Nadia Lockyer were married in April 2003. They have an 8-year-old son, Diego.

Nadia Lockyer is four years younger than Bill Lockyer's adult daughter, Lisa, from a previous marriage.

The treasurer said in a statement that he supported his wife's decision.

"I fully support Nadia's decision to step down as county supervisor and focus on completing her recovery and caring for our son," he said. "It's best for her, best for Diego and best for our family that she leave public office."