A chiropractor's lover has denied deliberately injuring a policewoman during an argument after all three of them had been in the same bed together.
Officer Louise Flanagin suffered cuts when she fell through a glass door after being pushed by hotel manageress Hazel Tempest at the Sutton Coldfield home of father-of-two Dr Matthew Hunter, Birmingham Crown Court heard.
But Tempest said she only shoved Miss Flanagin because she feared she was going to be attacked by her.
Tempest (27) of Windermere Drive, Streetly, has denied assaulting Miss Flanagin last May.
The court was told that Dr Hunter, who was married but estranged from his wife who had gone to America, had invited 22-year-old Miss Flanagin, who was stationed at Queens Road police station in Aston, for drinks at his home in Bishops Road.
Tempest said she had had a three-year relationship with the chiropractor, who she met in 2001, and that she had arrived at the address at about 10.50pm.
She said the three of them had chatted in the kitchen until the early hours and that Miss Flanagin had agreed to a suggestion to stay the night.
Tempest said after a spare room had been made up for Miss Flanagin she had gone to bed first, going to the bedroom she normally shared with Dr Hunter.
She said she undressed to her knickers and Dr Hunter had then got in wearing his boxer shorts.
Tempest said that Miss Flanagin then came in and undressed to her underwear.
"She climbed into bed on my side. I was in the middle.
"I loudly whispered to Matthew to let him know that she had got in bed.
"I don't know whether he was aware of that. It was just to let him know how uneasy I felt that we were all in that position," she said.
Tempest went on: "Louise then got out of bed in quite a hurry.
"She stormed downstairs quite upset with something."
She said she had followed Miss Flanagin to the kitchen to tell her that she was welcome to stay but that she had to have her own room, but she had then become very angry.
Tempest said she had since learnt that Miss Flanagin had been unaware about the relationship she had with Dr Hunter.
Earlier Miss Flanagin said she knew Dr Hunter socially and was aware he had a "playboy" image, owning two BMW's and a Ferrari, but denied that she was attracted to him or that she had got into bed with him and Tempest.
The trial continues.