The adventurous girl even clambered out laughing and sat on the taxi's back window showing off everything after she realised she was being filmed.
The incident - in broad daylight on a Saturday morning - began in Moscow city centre when a driver pulled alongside the bright yellow cab and spotted the half naked woman.
He was quick to yank out his mobile phone and capture some footage of the action - but he didn't expect her to welcome his attention so avidly.
When the bare-breasted girl in her twenties realised she was being filmed romping on her partner’s lap, she even started smiling for the camera.
Seconds later she then climbed out of the car window and flashed her boobs for everyone to see - prompting hoots from the horns of other drivers.
Her actions also seemed not to disturb her male partner, who was spotted giving everyone the thumbs up in a gesture of approval.
See the video below...