He put her out of her misery.

A Florida man shot and killed his dementia-stricken wife behind her assisted-living home — after she begged him to do so, a report says.

Stephen Kruspe, 62, told Boynton Beach police that his wife, Pamela, had wanted to die for quite some time and urged him to take her life on Monday night after 42 years of marriage, the Sun-Sentinel reports.

“I want you to kill me,” she said, according to Kruspe.

Moments later, the heartbroken husband told cops, he shot his wife in the chest with a .45-caliber handgun, hugged and kissed her goodbye, and then went to call authorities.

Kruspe was arrested and charged with homicide after turning himself in.

A next-door neighbor, who knew the couple for roughly a decade, said she wasn’t shocked by his decision to put an end to his wife’s pain.

“They were crazy about each other,” Jaclyn Tittsworth told the Sun-Sentinel. “They’d run together, rode their bikes together. If one was at the mailbox, the other was at the end of the driveway, waiting.”

After finding his wife’s body, Kruspe told police that he hoped she was finally at peace — after suffering from severe dementia and mental illness in recent years.

He claimed the 61-year-old looked up at him and smiled after he pulled the trigger.

“I feel like the only plausible explanation for him doing this is because she asked him to do it,” Tittsworth said. “He would do anything she asked of him.”

During his interview with detectives, Kruspe allegedly told police he had been weighing whether to kill his wife for the past several days. He said he was ultimately willing to do anything in order to “get her where she wanted to be,” the Sun-Sentinel reports.

The Kruspes, who have three children, spent the past several years enjoying their retirement together before Pamela’s mental health began deteriorating, Tittsworth said.

“This disease just started unraveling her,” she explained. “I didn’t realize until she stayed over one night and she needed help showering and brushing her teeth.”

The dementia also took its toll on Stephen Kruspe.

“I really saw him change before my eyes,” Tittsworth said. “He used to be so jovial, so happy. He got depressed. He wasn’t sleeping … he was so attached to that woman.”

Kruspe eventually was forced to move his wife into the assisted-living facility in January after things began to get physical.

“At one point she attacked him and he called the police,” Tittsworth said. “That’s when they realized she needed to be in a home.”

Kruspe appeared in court Tuesday and reportedly was ordered to remain jailed without bond. The investigation into his wife’s death is said to be ongoing.