Value bet or check behind Kings with rivered Ace?

[TimovieMan]

Poker Room – Limit .25/.50 – 8 players

Only about 30 hands played with both villains (so no stats), but seen them showdown enough to know this:

Villain 1 – Limpy McFish – plays any ace, any two suited and nearly any king as well, openlimps AKo on the button, will see showdown with any overcard (even if only king high), doesn’t bet trips, and calls down bottom pair on a 4-flush board.

Villain 2 – Tricky McFish – same preflop standards as Limpy (including openlimping with AK on the button, but raising decent pocket pairs), but very LAGgy postflop, especially on the river: he’ll bet air into a 4-flush (Clarkmeister anyone?), he’ll bluff-raise scare cards, but will also call down any ace high.


Pre-flop: hero is on the button with K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/club.gif[/img]
Tricky limps, UTG+1 (poster) checks, 3 folds, <font color="red">hero raises,</font> Limpy calls, BB folds, Tricky calls, UTG+1 calls.

Flop: 9[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (9 SB – 4 players)
Limpy, Tricky and UTG+1 check, <font color="red">hero bets,</font> Limpy calls, Tricky calls, UTG+1 folds.

Turn: J[img]/images/graemlins/heart.gif[/img] (6 BB – 3 players)
Limpy and Tricky check, <font color="red">hero bets,</font> Limpy calls, Tricky calls.

River: A[img]/images/graemlins/club.gif[/img] (9 BB – 3 players)
Limpy and Tricky check, <font color="red">hero ???</font>


The river is one of the only three cards that scare me.
Neither of them have the spade flush, they would have donked the flop otherwise, AND shown aggression (especially Tricky). But since they’re seeing the river with me, they could have any spade, any board pair or small-medium pocket pair (no set), or any ace.

Limpy doesn’t scare me. If I bet, he’s going to call me, even if he has the ace. He won’t dare raise me (and if he does, it’s an easy fold).
The problem here is Tricky. If he has the ace, and I bet, he’s likely going to check-raise me. If he DOESN’T have the ace, he’s likely going to bluff-check-raise me, so I’ll have to call down.
Either way, I’m going to pay two for the showdown which I could get now for free…

So, do I (value) bet this, or do I simply check behind?