Value bet or check behind?

[ezratei]

Obviously the turn check raise here raised the alarms and I called drawing for the house.

BUT ... I think it's rare for people to check this river with a flush. That left me just concerned with the straight and thinking that I should throw a smallish (1/3-1/2 pot) bet out there to get a call from 2 pair or even a ace.

Dealt to ezratei [ Qc, Qh ]
ezratei raises (30) to 30
terrific28 calls (30)
jmw1515 calls (25)
loloTRICKEDu calls (20)

** Dealing Flop ** : [ Kd, 2h, Ad ]
jmw1515 checks.
loloTRICKEDu checks.
ezratei checks.
terrific28 checks.

** Dealing Turn ** : [ Qd ]
jmw1515 checks.
loloTRICKEDu checks.
ezratei bets (110)
terrific28 folds.
jmw1515 raises (220) to 220
loloTRICKEDu folds.
ezratei calls (110)

** Dealing River ** : [ 4c ]
jmw1515 checks