John Cena keeps his marriage low-key because he wants to protect Shay Shariatzadeh’s “safety and wellbeing”. The 46-year-old star has been married to Shay, 35, since 2020, and John is determined to shield his wife from the spotlight. During an appearance on the ‘Armchair Expert’ podcast, John shared: “One of the promises I made to her on the altar was, ‘I will never put you or I’ll do my best to not put you in an undue harm’s way’. “So a lot of it is just about genuine safety. And it’s not to say that everyone out there has bad intentions or we’d ever run into someone bad, but you also never k…