Prince William and Kate Middleton have been openly demonstrating their affection in public in recent months, with insiders telling OK! the PDAs are being "engineered" by William to send a clear message their marriage is firmly on solid ground following huge personal challenges – including a lingering allegation he's been unfaithful.

The Prince and Princess of Wales likely realize that their new neighbors aren't necessarily pleased with the new "security" they've installed around the property. But according to Bond, Kate and William won't let any "fury over" their new home prevent them from celebrating the holiday season.

For more than a millennium, Christmas at Sandringham has symbolized the continuity of the British monarchy. This year, the Prince and Princess of Wales plan to attend church on the estate and then quietly withdraw to Anmer Hall,

Tensions between the brothers have simmered for years, punctuated by sporadic private contact and competing public appearances. Harry, 41, has lived in the U.S. since what became known as "Megxit," while William has stepped up domestic duties and international diplomacy as he prepares to become king.

Prince William and Kate Middleton are speaking out after a terror attack left at least 11 people dead in Sydney, Australia. On Dec. 14, two gunmen opened fire at Bondi Beach where Jewish community members were celebrating the first night of Hanukkah,