10/20 6max: interesting (?) river decisions

[ctv1116]

Villian is a 58/11/2.1 player with a 3.1% C/R (which is twice what mine is).

Villian limps in the CO, I raise on the button with JdJc. Blinds fold, so we're HU to the flop.

Flop comes 3h7h2h. Villian leads, I raise, Villian 3bets, I call.

Turn is a 5s. Villian bets, I call.

River is 4h. Villian checks, I bet (???), Villian pauses then raises, I pause...

Pot size is currently 10.75BB