Pippa Middleton and Prince Harry have been “secretly dating” for three months, OK!Magazine reported Wednesday. However, Gossip Cop, citing a palace insider, debunked the report saying that Kate Middleton’s sister and her brother-in-law are not romantically involved.

According to OK!Magazine, Prince Harry and Pippa originally locked lips in 2011 at the royal wedding between the Duke and Duchess of Cambridge. The report also claimed that it had details about Prince Harry and Pippa’s attraction for each other, and that this was rekindled after the two became single again.

“There’s always been sexual tension between them, even when they were dating other people,” a source told OK!Magazine, according to Daily Mail, adding that it was Pippa who recently made the first move in her alleged romance with Prince Harry. The magazine also claimed that Prince Harry and Pippa flirted during her sister's wedding to Prince William in 2011.

"At one point, Kate went to check her make-up and found them snogging in a bathroom," the source reportedly said, adding that Kate Middleton was not happy about the incident. The magazine reported that Prince Harry pursued Pippa for months but the 32-year-old did not reciprocate fearing her sister. Prince Harry and Pippa later went on to date other people.

Pippa Middleton split with financer Nico Jackson in October after dating him for three years, while Prince Harry has been in on-again, off-again relationships with British model Cressida Bonas and Zimbabwean Chesly Davy.