A Liverpool FC physio had oral sex with a colleague in a Portakabin and sent her pictures of his penis when up to 100 young players could have walked in on them, a hearing was told.
Married Liam Kershaw, 42, began an affair with the woman, 29, after the club's Christmas party in 2014, the Health & Care Professions Council heard.
They had 'sexual activity' four times during working hours at the club's premises between February and September 2015.
When one of his colleagues tried to get into the Portakabin, they found it locked and eventually came across a 'surprised' Mr Kershaw inside with the woman.