TPTK on bad river

[YanMTL]

Is calling the river a very stupid call?

This guy is a LAG and i have a spacial note that he spew a lot when a flush draw hit on the turn, during this session, i saw him check-raise the turn when a flush hit twice and he didn't have it both time.

So my call on the turn is easy but on the river?

GAME #708873433: Texas Hold'em L $10/$20 2007-11-03 05:59:29
Table Clare
Seat 3: Boohdack1979 ($600.25 in chips)
Seat 6: Hero ($741.50 in chips) DEALER
Seat 8: charlieboy46 ($277.06 in chips)
Seat 10: zambnoiq ($879.82 in chips)
charlieboy46: Post SB $5.00
zambnoiq: Post BB $10.00
*** HOLE CARDS ***
Dealt to Hero [K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/heart.gif[/img]]
Dealt to Boohdack1979 [XX XX]
Boohdack1979: Raise $20.00
Hero Raise $30.00
charlieboy46: Fold
zambnoiq: Fold
Boohdack1979: Call $10.00
*** FLOP *** [10[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img]]
Boohdack1979: Bet $10.00
Hero raise $20.00
Boohdack1979: Call $10.00 (think he has KQ or KJ here, two pairs, set, he would have raised again)
*** TURN *** [8[img]/images/graemlins/club.gif[/img]]
Boohdack1979: Check
Hero: Bet $20.00
Boohdack1979: Raise $40.00
Hero: Call $20.00
*** RIVER *** [9[img]/images/graemlins/club.gif[/img]] [img]/images/graemlins/confused.gif[/img]
Boohdack1979: Bet $20.00
Hero: Call $20.00
*** SUMMARY ***
Total pot $233.00 Rake $2.00