The move here is fold? Or not?

The setup: The villan (Arctrus) is the calling station from hell. I think he called LITERALLY EVERY ONE of my preflop raises for the past 45 min, which is why I was elated to be delt AA with position on him.

I had already doubled this guy up twice. Once on a 3437Q board where I had 88 and he had Q2, and on a AA74Q board where I had TT and he had QT. I potted every street both times, and by the river I was pot committed. My (correct) read both times was that he had absolutely nothing, yet he spiked me on the river after I had put too much money in to fold.

Anyway, the hand:

Hand #78558801 at table: Table TH 507
Started: Thu Jul 28 19:31:23 2005
NL $100 .5/1 Blinds 5 max

kristianlm is at seat 1 with 36.75
ruggetti is at seat 2 with 27.36
Arctrus is at seat 3 with 108.95
highbury90 is at seat 4 with 59.85
undermined is at seat 5 with 72.91

highbury90 posts the large blind 1.00
Arctrus posts the small blind 0.50

Arctrus: --, --
highbury90: --, --
undermined: Ah, Ac
kristianlm: --, --
ruggetti: --, --

Pre-flop:

undermined: Raise 5.00
kristianlm: Fold
ruggetti: Fold
Arctrus: Call 5.00
highbury90: Fold

Flop (Board: 3d, Kc, 10h):

Arctrus: Check
undermined: Bet 10.00
Arctrus: Call 10.00

Turn (Board: 3d, Kc, 10h, Jd):

Arctrus: Check
undermined: Bet 20.00
Arctrus: Call 20.00

River (Board: 3d, Kc, 10h, Jd, Ad):

Arctrus: Bet 40.00
undermined: ?? (his bet pushes me all in for $37).

Am I pot committed? Should I fold?

I will say that my blood pressure WAY up when we showed down.

He must love his Qs.

So it was $37 to go there for you? Yea I would call it, knowing he had the straight or flush. There's the chance he was playing KK, TT, AK or even KT there.

Edit: should add that given his passive play I may have gone all-in on him on the turn.

call

Calling stations who suddenly bet on the river in first position after check/calling the whole time have either been slowplaying or they hit the draw on the river. They will never try to check raise the river, and if they don't have the straight they wouldn't bet.

Yeah, I knew he had rivered me, It just was so freakin' annoying. I knew that at the point of calling the river bet I was tilted pretty bad, which is why I wanted opinions on bad call or not. In hindsight, I thought the exact thing. When the calling station lights up, its time to drop your cards.

BTW, he showed down Qs 6s. I just about flipped a shit when I saw what he called me on the flop and turn with.