She told the Mail Online: "The stress it gives you in life and even 12 years down the line, I'm still classed as a lottery winner and it's horrible. It ruins your life. People treat you differently - it's just not a nice thing."
Their relationship began to deteriorate on Boxing Day last year, when Mr Jones, 41, said his wife announced she was leaving him.
But, during a make-or-break trip to Cape Verde in March, Mr Jones claims he discovered his wife's affair with Mr Clare after reading text messages exchanged between the two.
Mrs Jones initially denied a relationship with the businessman, saying they were "just good friends".
But Mr Clare - who now runs property firm Clarenco and is worth an estimated £260 million - yesterday confirmed the relationship, although he is still married to his wife of 37 years, Carol.
"I am seeing Victoria Jones. She didn't leave her husband for me," he told the site.
"We're not living together or anything like that, I'm seeing her. I'm quite friendly with my wife, I had a meeting with her yesterday.
"I haven't just seen Victoria. Everyone knows I've seen different girls and [my wife] is aware."
Mr Clare, 61, is said to have separated from his wife in August and the Jones' are believed to be in the process of splitting their assets.
The couple are the latest in a series of partners to split after winning the lottery, dubbed the "lottery curse".
Les and Samantha Scadding split four years after winning £45.5 million in 2009 and Adrian and Gillian Bayford separated a year after their £148 million prize in 2012.