Party 10/20 6max

I open AQs from utg+1 and villain (40/26/1 after 40 hands) 3-bets from CO and we get it HU.

Flop: (7 SB) 245r, one of my suit, I check call.

Turn: (4.5 BB) 245Qr, I check-raise and call a 3-bet.

River: (10.5 BB) 245Q3, I bet.

YAY/NAY? Check-raise the river? Also, do we have to call a river bet UI against this relatively unknown player?