So they'll still talk about it at some point. Strange doesn't exactly know what Shura means by 'when that's closer' (when the chaos of the City gets closer to settling down?) but it's an admission that they'll talk about it at some point so he will grasp onto that admission and cling to it with his life.

"Troublesome but understandable. I don't think anyone would blame you for doing something that kept you safe. This is Lykos's problem, not yours." It's obvious that Strange is still placing a lot of his blame on the Defenders and on Lykos's insistence that he keep things a secret in the first place.