Catherine Kieu, 48, appeared briefly in Orange County Superior Court in a navy blue jail jumpsuit, hiding her face with her long, dark hair. She was appointed a public attorney to defend her and was denied bail.
The petite woman whose chains clanked as she shuffled into the caged area of the courtroom where inmates are held will return to court July 22 for her arraignment, which was continued on Wednesday, and a bail review hearing.
Kieu and her husband were still living together in a Garden Grove condo that he owned. He had filed for divorce in May, and they argued before the attack about friends staying at the condo, authorities said.
On Monday night, police say Kieu spiked a meal and served it to the victim.
The 60-year-old man started to feel sick and went to lie down, then awoke tied to the bed as Kieu attacked him with a 10-inch kitchen knife, police said.
She then put the penis down a garbage disposal, police said.
"It's hard to believe what would motivate a person to do this sort of thing," the district attorney's chief of staff, Susan Kang Schroeder, said outside court. "It's one of the worst things you could do to a person short of killing him."
Newly appointed defense attorney Lee Gabriel made no public statement after the hearing.
Police did not release the victim's name. He underwent surgery and was listed in good condition at University of California at Irvine Medical Center, hospital spokesman John Murray said.
Murray declined to say whether the penis was reattached or provide any additional details about the victim's condition, citing patient privacy laws.
Kieu was charged with one felony count of torture, one felony count of aggravated mayhem and sentencing enhancements for great bodily injury and personal use of a knife. If convicted of all counts, she could face life in prison without the possibility of parole.
Garden Grove Police Lt. Jeff Nightengale said Kieu called police Monday night to report a medical emergency and told arriving officers "he deserved it" before pointing to the room where the victim was found bleeding profusely. She was taken into custody without incident and refused to talk to officers further.
The couple was married in December 2009. When the victim filed for divorce, he cited irreconcilable differences, court records show. Kieu was slowly moving her things out of the condo, authorities said.
The victim declined to comment when he was reached by phone Tuesday by The Orange County Register.
"This is a private matter," he said.
A call by The Associated Press to a phone number listed on court documents for the victim was answered Wednesday by a person who promptly hung up.
Officers visited the victim on Tuesday and found him in "amazingly good spirits considering everything he has gone through," Nightengale said.
Neighbor Lourdes Painter said the couple did not have any children and seemed quiet. Kieu and her husband lived in a second-story condo in the working class complex. Painter lives in the unit below them.
Detectives were analyzing the food served for dinner.
In 1993, Lorena Bobbitt cut off her husband's penis in Virginia and threw it out of her car window into a field on the side of the road. She claimed years of sexual abuse drove her to the attack, and she was acquitted by reason of insanity.
The penis was later reattached.
Associated Press video journalist John Mone contributed to this report.