Board Thread:TV Show Discussion/@comment-29740399-20161026202030/@comment-3035448-20161027010450

It's tough to say. Telling Cat the truth would have certainly saved both her and Jon a LOT of hurt in that she would have been kinder to him, knowing that he wasn't really Ned's bastard. On the other hand, her publicly accepting Jon would probably have aroused suspicions about his parentage.