Article continues below advertisementPrince William is standing at a defining crossroads as Britain's future king, with aides warning a continued freeze-out of his younger brother could carry consequences far beyond a family feud, OK! can reveal. The Prince of Wales, 43, already acting as a pillar of stability during a turbulent period for the royal family, is under growing pressure from advisers who believe reconciliation with Prince Harry, 41, is not just personal but constitutional.