User blog comment:Master Sima Yi/Assassinews 31-03-'15 — Assassin's Creed Chronicles announcement trailer/@comment-13471981-20150511182331/@comment-5174994-20150511195332

Yeah. Incest is not the way to go when establishing a good brother-sister relationship. That would just make their relationship weird & wouldn't allow you to connect with them in the same way a normal relationship would.