Minema Kirk was done.

She wanted to end her three-year marriage with her wife, Sagal Sadiq.

On Dec. 30, she sent a text from Puerto Rico with a simple message: “Done.”

Back in San Jose that night, the spurned Sadiq exploded, according to police documents. Within reach was Kirk’s mother, Yvonne. And a machete.

When the Somali native and longtime nurse was through with her bloody rampage, police said, Yvonne Kirk, 65, had been hacked to death in the Willow Glen bungalow. And a slightly wounded Sadiq was trying to fool investigators that they both had been attacked by a masked man.

“Trying to get power and control is a common motivator for violence directed against an intimate partner or their family members,” said prosecutor Dan Fehderau. “I expect the evidence will show that this is a particularly horrifying example of that.”

The police report released Thursday — the same day Sadiq was arraigned on a murder charge — details a horrific domestic violence case. Sadiq, whose left arm was wrapped in a bandage, said nothing at her court hearing, which some of her family attended. Her high-profile Walnut Creek attorney, Michael Cardoza, said afterward that his client is “frightened and a little depressed, but that’s expected in a situation like this.”

Sadiq did not enter a plea, and the case was continued until Jan. 19. Judge Jerome Nadler ordered Sadiq not to communicate with Minema Kirk, which the prosecutor said she had tried to do from jail, where she is being held without bail.

Yvonne Kirk’s sister and a small circle of supporters were also there, but declined to comment, other than to say that Minema Kirk, who was not present, is “safe.”

Domestic violence left 11 people dead in Santa Clara County last year; Sadiq is the only woman suspected of being the attacker.

This death was unusual because of the gender of the suspect and the type of weapon used. But experts say it fits a classic domestic violence theme: All of last year’s homicides came during some stage of breakup.

Taking the pain out on a partner’s loved one is “not as unusual as you think,” said Patty Bennett, director of programs at Next Door Solutions to Domestic Violence in San Jose. Often, jilted partners will threaten, “If you leave me, I’ll kill whoever is closest to you,” she said. “It might be the kids, parents, a pet, anyone who is going to get the most reaction.”

Minema Kirk, 34, and Sadiq, 40, were married in November 2008 in the brief window when same-sex couples could wed in California, police documents state.

Kirk, a Peace Corps alumni, is a leadership development manager at Goodwill Industries of Silicon Valley. She has declined to be interviewed. Kirk’s family also declined to say much about Yvonne Kirk, who, according to her Facebook page, worked for nearly 30 years as an employee of Advanced Professionals Insurance and Benefit Solutions of San Jose. Her profile shows that in addition to Minema, she had a grown son and a grandson. One friend, Maria Martinez, whose daughter was a cheerleader with Minema Kirk at Willow Glen High, called Yvonne Kirk “a wonderful person, kindhearted, easygoing, cheerful. I never saw her angry.”

Sadiq was a registered nurse at Kaiser Santa Clara. A Web profile said she was studying to be a lawyer. Her daughter called her caring and kind.

At some point, the relationship between Minema Kirk and Sadiq went sour. Kirk told police after the slaying that Sadiq had hurt her at least a dozen times, police said. She never reported those attacks, but in November, she decided to leave.

On Dec. 27, Kirk left for a vacation to celebrate New Year’s, alone.

Three days later at 7:15 p.m., Sadiq called 911: A masked man had been on her front porch, but she chased him away, she said.

Officers were not dispatched.

Within the hour, police reports show, Sadiq called Kirk’s mother to come over and make her feel safe.

At 10:41 p.m., Minema Kirk sent the text to Sadiq. She wanted to move out.

A little more than 15 minutes later, emergency workers got a much more ominous 911 call from Sadiq’s phone.

“Please help us!” someone said before hanging up.

Police officers raced to 1994 Johnston Ave., where Sadiq and Minema Kirk lived. A dispatcher called the number back. Sadiq answered. She said the stranger had run away. But the dispatcher heard sounds. Someone being struck. A woman’s voice — not Sadiq’s — moaned, “Ouch.” Later, the same distressed voice is heard saying: “Please help! Enough already!”

At 11:15 p.m., police met Sadiq in the front yard. She had wounds on her left forearm. Yvonne Kirk, however, had been savagely slashed. And soon, she was pronounced dead.

Sadiq’s strange story began to fall apart almost immediately, according to police.

The cuts on her arm did not, to investigators, look like defensive wounds. There were no signs of forced entry.

And Sadiq’s story of the masked intruder changed when she spoke with a police detective. Now, the masked intruder was a UPS delivery man. She said he had left a package of shoes.

Police searched the house. They found a shotgun in the garage, a handgun in the living room and a stun gun in the bedroom.

Sadiq was arrested on suspicion of homicide, her mug shot taken while still wearing her hospital gown.

It was the 41st, and final, homicide of 2011.

Contact Sean Webby at 408-920-5003. Follow him at Twitter.com/seanwebby. Contact Lisa Fernandez at 408-920-5002. Follow her at Twitter.com/ljfernandez.