You can’t go through something like that and come out the other side unchanged. She is a different person now," an insider tells PEOPLE in this week's issue

"She is a different person now." Kate Middleton may be slowly returning to the spotlight amid her cancer recovery, but that doesn't mean she's back to her old self again quite yet. According to a family friend,

Kate Middleton hosted a Christmas carol service and is easing into royal duties while prioritizing well-being.