The woman, who spoke to Daily Mail, claims she watched Troy 'flirt with every single girl who wanted to take a photo.'
The 35-year-old was drinking at the casino with co-star Sean Thomsen, on Saturday night, when 'two young women attached themselves'.
'The girls tried to follow him and Sean but Troy was just interested in chatting up every single girl who wanted to take a photo with them,' the woman says.
'They took the girls to the bar multiple of times but then Troy was more interested in pursuing any woman who showed him the slightest interest.
'Towards the end of the night it was basically Sean and the two girls watching on while Troy being extremely loud, trying to lap up any attention he could get.'
The woman's account comes just days after the reality star's sister claimed he was 'still on the V-plates', which is slang for somebody who is yet to lose their virginity.
Meanwhile, on Married At First Sight, Troy and Ashley are still working through their relationship with both voting to 'STAY' at last week's commitment ceremony.
In case you missed it, Troy also caused a media frenzy last week when he was spotted rolling around in the grass, kissing and groping fellow MAFS contestant Carly. The two are still supposedly married to their TV partners - Ashley and Justin.
For more Married At First Sight news, see here.