5/10 playing 4 handed.
Main Villain(V1) late 40s white guy just sat down 15 min ago with $2k max. He's a rec and seems fairly MUBSY by the type of hands he verbally reads other players for.

V2 early 30s Asian gambly type. He's pretty loose pre, but has folded a lot to big bets/raises pre. He's a big station post flop.

V1 opens btn to $35, V2 calls in the SB. I have KQss in the BB and decide just call. (Didn't want to 3bet and fold V2 out)

Flop($105) As9s4h
Check/check/$65. V2 folds and we call.

Turn ($235) As9s4h 9h
I donk out $120. Villain thinks for around 15 secs and calls.

River ($475) As9s5h 9h 7s
I bet $185. Villain tanks. After a while cuts out a call and places it to the side. Thinks for about another 30 sec and counts out an additional $450 and raises to $635. Hero should???

Not really sure if he's raising smaller flushes here. But my hand looks a lot like a bare 9 so it's possible. Or maybe he's turning a Ace into a bluff?? Ughhhhh