Catherine, Princess of Wales is said to be “working from bed” at home after undergoing abdominal surgery. The mum-of-three, 42, went under the knife earlier this month for an undisclosed procedure and an insider has now claimed she has returned to her family home of Adelaide Cottage on the Windsor estate to recover so she can return to public duties this Easter. A palace insider also told Us Weekly Catherine is already “planning engagements and speaking with her team” to prepare for her comeback. They added: “Catherine will still be healing for several weeks but is already eager to get back to…