Sooo uhhhh... Who did Sesshomaru fucked? Grown up Rin?... Creepy but definitely a possibility.
There are 3 kids on art. He fucked rin and took kagome from inuyasha . Then inuyasha found some second hand half demon so now all 3 kids are half demons and on equal footing.
It takes genuine talent to see greatness in yourself despite your absence of genuine talent.