cushiony abode in Montecito, Calif. and head to his homeland on May 8, to celebrate the 10th anniversary of the Invictus Games, which he founded.However, the Duke of Sussex, 39, has reportedly been having several “sleepless nights” ahead of the journey, thanks to his famously strained relationship with other members of the royal family — especially with estranged brother Prince William.His wife, Meghan Markle, may very well be joining him on the trip, possibly adding to his anxieties.