Kate Middleton's sister, Pippa, and the Prince of Wales, Prince Harry, are believed to be in a relationship. A recent report claimed that the two have been secretly dating for the past three months. They were reportedly caught by the Duchess of Cambridge making out during her wedding to Harry's brother, Prince William, in 2011.

The front cover of OK! magazine shows a photo of Prince Harry and Pippa, both in their swim wears. The line "Pippa & Prince Harry Caught" is written along with their pictures.

According to the publication, the 31-year-old royal bachelor first got attracted to Pippa during the royal wedding. The pair reportedly flirted at the reception and was caught by Kate herself making out inside the makeup room.

"At one point, Kate went to check her make-up and found them snogging in a bathroom," a source told OK!, adding that Kate was very unhappy at what she saw.

The tabloid further asserted that Prince Harry pursued Pippa for months. However, his intentions were not reciprocated because Pippa didn't want to do something that could upset her older sister. They eventually went on to date other people.

However, another source, who is believed to have knowledge of the pair's feelings for each other, told OK! that the sexual tension between them was still there. The 32-year-old even showed up at the prince's doorstep one night, wearing tight jeans and sheer top. They had dinner at Prince Harry's place where he cooked carbonara, lit some candles and listened to some soft music. Pippa reportedly left at 3:00 am.

Since then, she had supposedly been staying overnight at Prince Harry's place several times. However, they have been very sneaky about it so as not to get caught.

Moreover, Prince William reportedly saw them in an uncompromising position when he went to visit his brother unannounced. The Duke of Cambridge was believed to have been upset at what he saw, but thought it's too late to stop their feelings for each other. Pippa and Prince Harry reportedly have a "real emotional connection" with each other and that their relationship is becoming "more serious."

The palace has yet to comment on this report from OK! magazine. Meanwhile, this is not the first time that rumors have spread about Prince Harry's love life. Back in November, it was also reported that he has an illegitimate child after getting a 19-year-old pregnant from one of his wild night outs. That story was never commented on by the prince or by royal representatives.