What If Catelyn Kept Her Promise? (Game Of Thrones)

In both show and book Jon catches a lot of slack for being born out of wedlock but he catches the most it from his stepmother Catelyn. Though despite her disdain for him in the show she remorse for her harsh treatment of Jon and once upon a time made a promise to love him as a son. A promise she did not keep. But what if she did? #whatif #asoiaf #gameofthrones