Kate Middletonwas seen for the first time since her Mother’s Day photoshop scandal, and the Princess of Wales’ melancholy expression mirrored her late mother-in-law, Princess Diana. After Kate admitted to “editing” her family photo, she and Prince William appeared tense in a car ride to a “private appointment.” “It’s an awful lot to be under all of this public scrutiny when you are recovering from major surgery,” a source told an outlet. “The rumor mill — particularly on social media — has gotten out of control, but Kate is recovering well and she will be back by Easter.” Kate stepped away fro…