Justin & Jess not 'N Sync - LIVING A LIE!

Can the couple survive their seven-year itch?

Justin Timberlake has been playing the part of the dutiful husband perfectly. On Valentine’s Day, the singer posted a gushing tribute to his wife Jessica Biel, captioning a throwback snap of the pair, “When you know, you know. I love you, my funny Valentine.”

And publicly the couple have been presenting a united front, with Justin even supporting Jessica, 37, at the premiere of The Sinner season three earlier this month. But behind the scenes, their seven-year marriage has been put to the test like never before.

In November, a boozed-up Justin, 39, was caught holding hands with his Palmer co-star Alisha Wainwright at a New Orleans bar. He quickly issued a public apology to Jessica, insisting “nothing happened” with Alisha, vowing to do better as a husband and a father to their son Silas, four.