The Hawaii doctor accused of trying to kill his wife was forced to admit to a jury embarrassing details about their relationship after her “emotional affair” with a coworker, including that they’d stopped sleeping together and he called her a “lying bitch and a w—e.”

Gerhardt Konig — an anesthesiologist on trial for allegedly bashing wife Arielle over the head with a rock during a hike — testified Thursday that after he found out about her “flirty texts” with colleague Jeff Miller the Konigs stopped having sex for months.

They didn’t have sex again after Christmas Eve 2024 in the time leading up to when he allegedly attacked her on March 24, 2025, Gerhardt admitted during cross examination Thursday, the Daily Mail reported.

“Arielle was unwilling to have sex with you whenever you demanded it, isn’t that right,” prosecutor Joel Garner asked, according to a report by HawaiiNewsNow.

“I never demanded sex, so that’s not right,” Konig, 47, responded.

“After you call a woman a lying bitch and a wh–e, it makes sense that they don’t want to have sex with you, right,” Garner pressed, prompting a successful objection from Konig’s defense lawyer.

Garner asked if Gerhardt called his wife the graphic insult.

“I did call her that at some point,” Konig answered.

Gerhardt chose to testify in his own defense on Wednesday and Thursday as he copped to hitting Arielle, 37, — a nuclear engineer — over the head, but insisting it was in self-defense after she attacked him first.

4

The lead up to the fight came in the wake of Gerhardt finding out she had a three-month-long emotional affair with her married co-worker Miller, he testified.

“I unlocked [Arielle’s] phone while she was sleeping” — a move prompted by Gerhardt noticing she had become glued to her phone, he said.

He then went into “detective mode” monitoring their messages in real time for two days after logging into her Whatsapp account from his computer, he admitted.

“I was upset about the entire relationship they had,” he testified.

On Wednesday, Gerhardt claimed Arielle attacked him while they were hiking the Pali Puka trail in Oahu after she brought up work travel with Miller.

The couple walked in different directions and when they came back together, Arielle’s demeanor changed and she suggested they take a selfie together by the cliff’s edge — when he felt a “shove.”

He claimed he was “almost pushed off the edge” before his wife yanked him to the ground.

“She keeps yelling, and she grabs my wrists and throws herself on the ground and pulls me down with her,” Gerhardt Konig, according to a report by KHON2. “I’m thrashing, and I get both hands free, and I’m trying to get her to let go of my testicles, and then she hits me with a rock.”

He claimed he managed to get the rock away from her and then hit her twice in the head with it in self-defense.

“I felt horrible,” Gerhardt said of the aftermath of the scuffle.

Arielle and her stepson — who is Gerhardt’s son — have testified against him during the sensational trial in Honolulu, Hawaii.

Son Emile Konig testified his dad called him on FaceTime saying “he would not be making it back to Maui and to take good care of the younger kids.”

Emile claimed the dad said his stepmom “had been cheating on him and that he tried to kill her,” according to a report by CNN.

Arielle also told jurors her account of the events, claiming he told her “f–k you, you’re done” before hitting her over the head and attempting to stab her with a syringe — which he has denied.

The case is expected to wrap up with closing arguments on Tuesday.

Konig has pleaded not guilty to attempted murder.