The battle against Sasuke had been a bloody and destructive one, which ended with both of them reconciling and undoing the Infinite Tsukiyomi before passing out. That was to be Narutos peace, but after waking up in an entirely different world, almost being a victim of meta-human trafficking and being introduced to the Team - he wondered if he would ever even have peace. Not slash.

Fearing for the safety of your family was natural, especially if it was you that endangered it.