DUBLIN -- Christine Hubbs, the former Livermore mother who went to prison for having sex with two underage boys over several years, was a free woman for five days before parole agents found her with pornography and arrested her.

The 44-year-old, who became known as "Hummer Mom" in the media because of the giant SUV she drove, was arrested by parole agents from the California Department of Corrections and Rehabilitation on Friday night at her Hayward home, said Fredrick Bridgewater, an assistant regional parole administrator.

It was during a parole check of her home that agents found she had pornography in her possession, which is a felony violation under the conditions of her parole, Bridgewater said. She had been released from prison the previous Sunday, authorities said.

Bridgewater declined to specify what type of pornography Hubbs had but said it was not child pornography. She remains in Santa Rita Jail in Dublin on a no-bail hold, which is standard for parole violators.

Meanwhile, two Livermore police detectives are investigating possible cyber bullying of at least one victim of the Hubbs sex-crimes case for threats and intimidation over the Internet, said Livermore police Officer Steve Goard.

"We are not ruling out that Christine Hubbs might have had something to do with the initiation of the threats," Goard said. He said police received word of the threats Saturday.

"We will be looking into the coincidence that there has been no activity against the boys for over 2 years and suddenly after her arrest by parole the threats begin," he added.


The boy or boys are not suspected of initiating the threats, Goard said.

Hubbs was arrested in August 2010 on a warrant after the mother of one of the teen boys went to Livermore police a month earlier to report she found a nude photo of Hubbs on her son's cellphone.

The boy told police the sex acts with Hubbs began in December 2008, when he was 14, and continued for a few years.

During that investigation, police learned of a second boy, who said he had a sexual relationship with Hubbs for several months when he was also 14.

Hubbs pleaded no contest to four felony counts: one of unlawful sexual intercourse with a minor under 16 and three of lewd acts on a child. In exchange for her plea, the Alameda County District Attorney's Office dropped 63 other felony counts in connection with the sex offenses and an unrelated misdemeanor case.

When she was sentenced to the five years in prison, a judge ordered her to serve at least half of the sentence and be on probation for up to 10 years. This month marks 2½ years since her arrest. She also has to register as a sex offender for the rest of her life.

Reach Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.