Jane Pountney has admitted to having an affair with best friend Katie Price's husband, Kieran Hayler.

Price, who is six months pregnant, revealed the affair to her 1.9 million Twitter followers, adding that, in light of the revelations, she now planned to divorce 27-year-old Hayler, who is her third husband.

While Pountney initially remained silent about the matter, her husband Derrick Pountney insisted that his wife did not have a seven-month affair with the former glamour model's husband, dismissing the matter as "a storm in a tea cup" over a drunken kiss.

Admitting the indiscretion, the 49-year-old has now confirmed the affair and has spoken of her 'deep regret' about the relationship.

In a joint statement with her husband, the mother-of-two said: "It is true that Jane and Kieran Hayler had an affair. This is something that Jane deeply regrets and we will not provide any more details about it. It is true that Kate found out about this affair yesterday."

Mrs Pountney has been one of Price's closest friends and was a bridesmaid when the 35-year-old married stripper Hayler, little more than a year ago. She was pictured with the couple and her own husband Derrick, 52, after the lavish ceremony in the Bahamas.

Mrs Pountney was also a bridesmaid for Miss Price when she married Alex Reid in Las Vegas in 2010.

Price, who is six months pregnant, has an eight-month-old son, Jett, with Hayler. The couple got engaged within weeks of meeting and married in January last year.

The split comes just days after the TV personality spoke of her love for Hayler, describing him as a 'good man' saying: "I've never been this happy with anyone before. With me and Kieran it's all about the kids and being together and just having a family. "

After the revelation, Price was seen with Mr. Hayler at the Poultney's' five-bedroom detached home for a 'tearful' crisis meeting on Wednesday (April 7).

Following her Twitter onslaught, Price later released a more eloquent statement on her website, which read:

"I appreciate most people will have seen my tweets on the subject of my marriage to Kieran. I make no apologies for them though it will be appreciated that, sending them immediately after Kieran confirmed to me what he had been doing for the last 7 months, those tweets were a sign of my heart breaking. That he was doing it with a close friend of nearly 20 years is hard to understand.

"This statement however is from my head, not my heart. I am appalled that someone I loved, trusted and believed in has behaved in this way. If he had so little respect for our relationship I would have hoped he would have thought about our child or the one that we have on the way.

"That he did not means he will no longer be part of my life. I will do all I can to ensure he maintains a relationship with his children should he want that. I am so grateful for the love of my children and family at this time."