A source close to William tells PEOPLE the prince will soon announce he's leaving the RAF Valley – a search-and-rescue helicopter unit based in Anglesey, Wales.
His work there kept him away from Kate, and the cozy farmhouse they shared with dog Lupo, for as many as 10 24-hour shifts each month.
William has said he loves his work with the RAF, but he loves his wife and baby-to-be even more.
"He's ready for the next step," says the source. The couple's baby joy has brought them even closer, say those who know them. "They've always been close but it's been much more pronounced since she has become pregnant," says royals author Judy Wade.
Find out more about how William is pampering his wife and how the couple is bonding over baby in the issue of PEOPLE, on newsstands Friday