Their love is killer.

A British woman has fallen in love with a U.S. prisoner who is serving 20 years for manslaughter.

Robyn Kett came across a Reddit post in June 2024 from a family member of Deandre Parsons, 27, asking if anyone would be willing to be his pen pal.

The family said in the post that Parsons, who killed a man with a firearm, was lonely.

The 33-year-old stay-at-home mom decided to send a message out of curiosity — she had just lost her partner, Nick, 35, to cancer in December 2023 and decided “life is too short.”

“I saw him. I just thought, ‘Why don’t I shoot him a message?’” Kett told South West News Service. “My friend was writing to somebody and said it was different and I was curious.”

She said they “instantly connected,” despite him not being her “normal type.”

“He was really easy to talk to. He seemed genuine,” Kett shared. “It was like I had known him my whole life.”

“You know when you feel something and it just grabs you,” she added.

When Kett and Parsons, both from Connecticut, first began talking, Parsons didn’t say too much about his conviction, Kett said, but he eventually began to open up.

“I Googled him to make sure he wasn’t a maniac,” she admitted.

Parsons pleaded guilty to first-degree manslaughter with a firearm in Stamford Superior Court after an armed robbery went wrong. In September 2022, he was sentenced to 20 years, SWNS reported.

“The original charge was felony murder,” Kett explained. “He went to a house to rob weed but a man and his partner and child were there. He didn’t go out that day to harm anybody.”

But Kett doesn’t judge Parsons for being a convicted killer.

“I can’t connect him with the crime. I’m not a judgmental person,” Kett said. “You can’t judge a person because of what they are in for. You don’t know the personal circumstances.”

The pair message every day, and Parsons calls Kett from the prison when he has the chance. He gets 10 messages and six free calls per day, and they use that time to discuss everything from food to TV shows.

“He makes me laugh,” Kett said. “I just ended up falling love.”

She added, “It’s all natural. He told me he loved me before he even saw pictures of me.”

The couple has now been talking for four months, and Kett plans to save up money and get paperwork to approve her visits completed in order to fly to meet the convicted killer in prison next year.

Despite his 20-year sentence, Parsons is up for parole in six years.

“He talks about the future a lot,” Kett said. “I’d move over there. I want a future with him.

“From losing my partner in December I realized life is too short. I didn’t expect to ever find love again,” she added.

Luckily for Kett, her friends and family aren’t judgmental either — they tell her “if you can find happiness, grab it.”