Party Poker 0.50/1 Hold'em (10 handed)

Preflop: Hero is Button with , .
UTG calls, UTG+1 calls, 1 fold, MP1 calls, 2 folds, CO calls, Hero raises, 2 folds, UTG calls, UTG+1 calls, MP1 calls, CO calls.

Flop: (11.50 SB) , , (5 players)
UTG bets, UTG+1 folds, MP1 calls, CO calls, Hero raises, UTG folds, MP1 calls, CO calls.

Turn: (9.25 BB) (3 players)
MP1 checks, CO checks, Hero bets, MP1 calls, CO calls.

River: (12.25 BB) (3 players)
MP1 checks, CO checks, Hero bets, MP1 raises, CO folds, Hero calls.

Final Pot: 16.25 BB

Results in white below:
MP1 has Qh Qd (three of a kind, queens).
Hero has Tc Ts (one pair, tens).
Outcome: MP1 wins 16.25 BB.

MP1 was ridiculously loose (72% VP$IP) and never pre-flop raised.

I was near certain I was beat on the river when he check-raised, but I really couldn't put him on a hand. He didn't raise or re-raise pre-flop. He didn't bet or raise on any street. And then he check-raises a Q on the river? I just HAD to see this one.

QQ? Wow. I was beat on every street and not given any indication until he makes a set on the river.