Calls pf raise then leads 3 streets

[cooker3]

Villain is 14/10/3.5
I am running at 21/19
This hand happened a few days so don't remember any major hands from the villain.
Comments on play on river decision?

iPoker No-Limit Texas Hold'em (NL100), $1.00 BB (6 handed) SilverKitty Hand History converter by www.pokeronline.com.ua

MP2 ($219.35)
MP3 ($187.45)
Hero ($147.1)
Button ($92.5)
SB ($180.82)
BB (Villain) ($128.2)

SB: Post SB $0.50
Villain: Post BB $1.00

Preflop:
Hero is CO with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img]
<font color="#666666">1 folds</font>
MP3 Call $1
Hero Raise $5
<font color="#666666">2 folds</font>
Villain Call $4
MP3 Call $4

Flop:($15.5) 8[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img]<font color="#0030DD">(3 players)</font>
Villain Bet $11
<font color="#666666">1 folds</font>
Hero Call $11

Turn:($37.5) 9[img]/images/graemlins/spade.gif[/img]<font color="#0030DD">(2 players)</font>
Villain Bet $21
Hero Call $21

River:($79.5) 3[img]/images/graemlins/heart.gif[/img]<font color="#0030DD">(2 players)</font>
Villain Bet $91.2
</font>

[spivey]

I think this is fine, now I'd fold river.

[nazahl]

this is how nits play their sets like 99% of the time.

[Hosehound25]

Def fold river, is almost always a set.