The model insists she was not paid for the advertising

Katie Price has been caught plugging her brother’s naughty ‘casual dating’ website on Twitter.

The pregnant model, 35, wrote about TripExciter – which is for ‘those who love travelling and are looking for love’ – as well as re-Tweeting comments and chatting to them.

‘some of you have asked what dating site I am currently a member of whilst doing research for my own site its xx,’ Tweeted Katie in June.

Cheeky business TripExciter has an adult spin-off section, which offers ‘horny’ members looking for a ‘play-cation’ the chance to arrange ‘out of hours meetings and casual hook-ups’.

Guidelines set out by the Advertising Standard Authority state that any promotions – including celebrity endorsement – must be obviously identifiable.

Although Katie never told her followers that the page belonged to her older sibling Daniel Price, a spokesman for the ASA says they haven’t received any complaints.

Katie was doing research for an article on a dating site,’ her spokeswoman tells the Daily Mirror.

‘She became a member of a site run by her brother to do this and loved the concept – thus her Tweets. They were not paid-for advertising.’

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Anna Duff