QQ - flopped top set vs. what appears to be a calling station

[LuvDemNutz]

5/10 NL - 9 handed

My read is that Villain is a calling station but he may also be tricky -
I saw him call two big bets on flop and turn with 66 on board of 3h 5h Js 4d

Maybe he called the flop because he thought his 66 was good or because he planned on taking the pot away if the flush hit. He the called a big turn bet with an OESD when he had to know his 66 was no good. He rivered a 2 and busted the another guy with QQ.

Villian has $1K and I have him covered.

I raise UTG+1 with QQ to $50 - villain cold calls.

2 to the flop ($115)

3c 2s Qd

I lead for $80, villain calls.

Turn ($275)

5d

I bet $190, villain surprisingly calls.

Now here I am not sure what to put him on. A lower set is possible but why no raise yet? AQ, or KQ seems likely. Maybe even a strangely played AA. 44 could be possible as the OESD would be there. Maybe even something wacky like Ad3d.

River ($655)

Kh

Does anybody check here to induce a bluff?

Villian has to be concerned with QQ or KK given the action so far.

If you are betting, how much are you betting?