The thief, 24, allegedly forced a staff member at the station to hand over cash from the till during a terrifying burglary in Bratislava, Slovakia in the early hours of Wednesday.
The male shop assistant then fled to the back office after allegedly being punched in the face by the ruthless robber.
According to the TASR news agency, citing a police source, a mystery woman entered the petrol station via a back door willing to help staff stall the criminal.
The female - who is not believed to be an employee - reportedly performed an oral sex act on the 24-year-old thief in a bid to stop him fleeing.
A staff member on the premises had already called the police who arrived to discover the woman and the robber lying naked on the floor, reports say.
It is not clear if the woman performed the reported act on the man out of fear of being assaulted.
Bratislava police spokesperson Michal Szeiff told TASR: "In one of the rooms, the officers saw the man receiving sexual services from the young woman."
According to local media, the woman told police when they arrived: "Take him, I can't anymore."
Mr Szeiff said the thief resisted arrest forcing cops to "use force" to detain him.