Kathryn Hahn’s children love the fact she’s part of the Marvel Cinematic Universe (MCU). The 51-year-old actress reprised her role as Agatha Harkness in Disney+ series ‘Agatha All Along’ and she is “very proud” to be part of the comic book world, particularly because of the enthusiasm of her and husband Ethan Sandler’s teenagers Leonard, 17, and 15-year-old Mae. She told Britain’s HELLO! magazine: “They love it, my daughter especially. “My kids were my entrance into Marvel, so this is a big deal for all of us as a family, even if my son pretends he’s way too cool for it all. “I feel very proud…