[sweetjazz]

GOT,

I think your line looks reasonable given your read. Not saying that calling the river is right or wrong, but CO is unlikely to have KQo and might not even 3bet KQs preflop, so that limits how many legit 3betting hands he could have. He is basically representing AA/KK/AK, with hands like KQs/88/77/66 possible but discounted heavily.

So basically he doesn't have to have a whole lot of bluffs, overplayed pairs between 9s and Qs to make the river call correct. That said, I don't really disagree with your line, but if I make this fold, I do have concern in the back of my head that villain doesn't have to get out of line that much to make a call better than a fold. (Even so, a fold is at worst a pretty small mistake given this opponent.)