The lover of a Colorado dentist on trial for allegedly murdering his wife methodically by poisoning her protein shakes took the stand Tuesday, sharing details of their emotional affair.

Dr. Karin Cain, a Texas orthodontist, took the stand in the Aurora trial of Dr. James Toliver Craig, 47. Craig is charged with first-degree murder in the March 2023 death of his wife, 43-year-old Angela Craig. Her cause of death was determined to be lethal doses of cyanide and tetrahydrozoline.

Cain testified that she met Craig at a dental conference in Las Vegas in February 2023. At the time, she had just finalized her divorce after 27 years of marriage and was adjusting to life as a single mother of two adult children. 

“This was the first man I had a one-on-one convo with in 30 years,” she told the jury.

“It felt exciting, like a high school girl.” Cain said. “It felt like love.”

A prosecutor closed by mentioning Craig’s lies about still being married, still living at home and hiring a prostitute during the initial Las Vegas business trip. 

“Yes,” Cain said, “a lot of what the defendant told me wasn’t true.”

Colorado dentist James Craig, right, is accused of fatally poisoning his wife and the mother of his six children, Angela Craig. (Facebook)

‘Sugar baby’ takes stand

Carrie Hageseth, a Lyft driver and single mother, testified Wednesday that she met Craig on Seeking.com and the pair fell into a “sugar babies” relationship. In a statement to Fox News Digital, a spokesperson for Seeking.com said it is not a “sugar babies” website and it “strictly prohibit(s)” any form of transactional dating.

“Our dating platform helps members build meaningful relationships based on shared ambitions and what truly makes them happy, be it romance, travel, luxury, freedom or whatever it is they aspire to in their connections,” the spokesperson said.

During one dinner, she testified, Craig referenced the movie “The Purge,” in which there is one day when everyone can kill whomever they want without consequence.

Craig, she testified, said that if he could “purge” someone, it would be his wife. 

He went into detail, Hageseth testified, describing how a person could be killed via injection without consequence.

Hageseth went into the intimate details of their “arrangement,” sharing that Craig paid for her daughter’s car in exchange for sex.

Fox News Digital has reached out to James Craig’s lead attorney, Lisa Fine Moses, for comment.