Prince William allegedly spent Valentine's Day with Rose Hanbury, a friend of Kate's.

Sources and various UK outlets reported the alleged romantic dinner.

The Daily Mail reported that Kate didn't expect flowers from William on Valentine's Day.

This isn't the first time rumors of an affair between William and Rose have circulated.

The story remains a source of speculation for royal fans and experts.

Rose has allegedly been banned from royal events following a reported row with Kate.

Rose has been married to David Rocksavage since 2009 and has three children.

The allegations have not been confirmed by the royal family.

The alleged affair rumors have caused trouble in paradise for Prince William and Kate Middleton.