Getty Stanley Tucci is defending his 21-year age gap with wife Felicity Blunt. While appearing on the May 7 episode of Jenna Bush Hager‘s Open Book podcast, the 65-year-old The Devil Wears Prada 2 actor explained why his relationship with the 45-year-old literary agent works despite their age difference. “It just sort of made sense, even though there is this age gap of 21 years,” Stanley explained. “I knew her family, or I knew her sister was on…