River spot with 99

[SA125]

He had AK and MHWG. BB was surprised and said he folded TT.

Been thinking about it because TT is the only worse hand I see Bn calling the river with. And even that is at best 50-50. I think he'd call with a an AJ type hand. So I don't see much sense in betting it.

But the fact that I would've called it has been eating at me. Because I'd say the chance of it being a bluff was 5-10% at best.

I should probably know it, but anyone know what the math is with that?