PokerStars No-Limit Hold'em, $2 BB (4 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($198.30)
SB ($40)
BB ($192.95)
UTG ($217.70)

Preflop: Hero is Button with 9, 9.
UTG calls $2, Hero raises to $10, 2 folds, UTG calls $8.

Flop: ($23) 7, K, 3 (2 players)
UTG checks, Hero bets $16, UTG calls $16.

Turn: ($55) 9 (2 players)
UTG bets $30, Hero calls $30.

River: ($115) 2 (2 players)
UTG bets $84, Hero ?


UTG either has a lower set or flush IMO. Turn play to me is just call and hope the board pairs...but what to do on river? Do you think he'd bet this hard without a flush, given my action PF? 33 and 77 seem very possible for him. My line doesn't look like a flush either.

Anyone fold?