Lea Yerevanian, 31, was waiting for an Uber outside Kings Cross St Pancras station at about 8.30pm in December when she nearly fell foul to the cruel trick.
The former Made In Chelsea star, 35, decided to go sober two and a half years ago after noticing she became an 'angry' and 'nasty' drunk - and hasn't looked back since.
The former Made In Chelsea star, 30, confirmed she is set to marry CEO in October after he popped the question during their sun-soaked holiday in Greece .