Wonder if Recognion has ever made incest happen or not?... And all the theories about him not being related to her because his wolf blood was removed are really thin at best.
If anything, the removal of Skywise's wolf genes makes him a closer relation to Timmain.
Recognition occurs specifically so elves don't closely interbreed. (Read the Pinis' FAQ answer on the subject.) Why is this still a question? Recognition picks out genetically ideal mates for breeding. If your DNA is too similar to someone else's then you're not ideal. Since the Go-Backs are the only tribe which consistantly breeds outside of Recognition, they're the ones that this should be a concern for.