so i got bored with nobunaga 14 and came back to this game for a change of pace, then i found something funny in one of my starts: nobunaga's son (called nobuhide in this one) is betrothed to nobunaga's sister, oichi. now before you touch the topic on incest, i just wanna know if this is a random occurrence, or something that AI actually prefers to do simply because marrying within a clan has 100% chance of acceptance.