John Shannon finally laid out what broke up the only married couple from "Love Is Blind" Season 11.

At Sunday's reunion he shared new details about the night that led to his split from Sarah Williams. He said it happened roughly six months earlier during a night out with the guys.

John said things never got physical. He did admit he went past a boundary Sarah had set for their marriage. He also confessed to trading inappropriate texts with the woman afterward.

"I guess so"

Host Nick Lachey pushed him to say plainly whether he saw it as cheating. John eventually gave in. "I guess so, huh? Yeah."

He later said the woman danced at a strip club and also worked as an escort. He said she handed him her number and he was the one who reached out. He again insisted nothing physical took place.

Sarah's side

Sarah called those messages a huge betrayal. She said they were what finally pushed her to leave.

She also described trouble with the way John communicated over the course of their relationship. She claimed he often insulted her and said hurtful things.

John took the blame, calling the breakup entirely his fault. He said he was crushed by how it all played out and has been going to therapy.

Sarah's divorce filing came in June. That was only a little more than a year after the pair became the lone Season 11 couple to say "I do."