Stars 1/2 SH
Villain has $220 and I have $500

Dealt KTo OTB and open for $7 when it folds to me.
Villain, your standard aggrodonk, reraises me to $25, as he's done at least twice in the last hr when I've opened OTb and we're heads up. This isnt going to fly. I'm going to win this pot with our without cards. I call.

Pot is $51

Flop is

Villain instabets $42, ok so I know for sure he doesn't have a set, which is all I really care about. No one instabets with a set in a raised pot OOP.

Villian bets $42
I take a second and call $42 with the intention of raising any turn.

Turn is , pot is $135

Villain instabets $70
Now, I'd said I planned to raise any turn here, but I think I'm ahead now and he's drawing pretty slim, so I smooth call hoping to get a 3rd barrel out of the guy.

river is the , pot is $275

Villain thinks and checks, hero does what?