Board Thread:TV Show Discussion/@comment-114.71.100.55-20160705071349/@comment-25402783-20160712205254

82.132.230.17 wrote: I believe that Robert Baratheon is John Snow's father. Him and Ned Stark's sister had something. So if John snow is Robert's son,HE IS THE RIGHTFUL KING.

The timing doesn't add up. Lyanna was gone for a little over a year in the Tower of Joy, so it's impossible for Robert to have concevied a child with her within that time frame.

Also, HBO confirmed that Rhaegar is the father.