A father of three has been found guilty of having sex with his ex-wife's bull mastiff dog.
Kelly Thacker told Gloucester Crown Court she was shocked to discover her ex-husband Nicholas Saunders, 46, in her bed having intercourse with the animal on January 15 last year.
During the two-day trial Ms Thacker, who has teenage twins with Saunders, told the court she had rejected her ex-husband's advances towards her after he had a fight with his bi-polar girlfriend and had sought comfort at her home.
It was soon afterwards she found him having sex with her female dog, Sasha.
According to the prosecution, when Mrs Thacker made it clear to him he did not have a chance with her he turned to the large dog.
Frank Abbott told the jury that Saunders had got undressed and climbed into Mrs Thacker's bed while she went downstairs to sleep.
"A little later, the dogs - one of which is a bull mastiff, a large dog - came upstairs and laid on the bed," Mr Abbott said.
"He (Saunders) said to the dog 'You've just ruined my chances'.
"Meanwhile, downstairs in the lounge, Mrs Thacker could hear things going on upstairs.
"She heard the defendant rummaging around.
"She then heard him whistle to the dogs, which had since gone downstairs, and they went upstairs.
"Sasha, the dog, got onto the bed. Mrs Thacker became curious and she went upstairs.
"She saw him, in fact naked, the dog on the far side of the bed facing away from the defendant and that he was clearly trying to put his penis into the dog's vagina.
"She couldn't believe what she was seeing."
Following his arrest Saunders was asked to provide an "intimate sample" from his penis, which, following forensic examinations, showed a 100% match to the DNA of a domestic dog.
Frank Abbott, prosecuting, said it would have been an "incredible coincidence" that DNA was found on a "fairly inaccessible" part of Saunders, backing up what Ms Thacker told the court she had seen.
Saunders, who separated from Ms Thacker 13 years ago, denied the charge and claimed his ex-wife had seen him merely "climbing over the dog" to get out of bed to use the toilet.
As the jury of five men and seven women returned the unanimous verdict Saunders, dressed in a dark suit and tie, looked to the floor and shook his head.
Recorder Stewart Patterson adjourned the case for pre-sentence reports to be completed.
Speaking directly to Saunders, of Lechlade, Gloucestershire, the judge said: "The jury have found you guilty. It is an unusual offence and unusual behaviour.
"I want to know more about you and the offence so I am going to adjourn this matter for pre-sentence reports until the 27th July."