I’m under the belief that Jon Snow is really the bastard of Rhaegar Targaryen and Lyanna Stark. That would make this incest. Before anyone bites my head off:
1. Rhaegar “raped” Lyanna while she wasacaptive
2. “Promise me, Ned.” Lyanna’s last words to Ned (Promise not to let them kill her child who was part Targaryen? Which was the practice when it came to them.)
3. Eddard Stark was considered by all to be an honorable man. Why would he cheat on Catelyn.
4. If Jon Snow wasahalf-breed Targaryen and Stark, who would haveagreater claim to rule then him? He’s part First Men, part Dragon. Of course this is all conjecture, just my personal observations.