Friends told the Daily Mirror that Amy Ward was trying to protect her new husband. They said Allen Herve tried to stop the guest because the man was behaving inappropriately.
Ward, 32, and Herve, 54, were married Saturday in a civil ceremony. She was arrested early Sunday morning at the Bromley Court Hotel in south suburban London.
"Allen confronted him. It was a family do and there were still lots of kids around," one guest said. "This guy took exception and knocked Allen to the floor. It was then that Amy waded in to try and protect her husband and a couple of blokes went in to help her."
Ward spent the night at the police station.
Police said she was released with a caution Sunday afternoon when the alleged victim declined to press charges.