50nl KJo 2 pair on river

[jfly]

Villian is 20/2 thru about 40 hands. No reads other than that. Do I check this river or make a bet? What can you put villian on after the flop and turn action?

Party Poker No-Limit Hold'em, $ BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP1 ($41.15)
MP2 ($49.25)
MP3 ($14.20)
CO ($19.60)
Hero ($141.29)
SB ($79.40)
BB ($55.40)
UTG ($49.25)
UTG+1 ($10)

Preflop: Hero is Button with K[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $0.25.
<font color="#666666">2 folds</font>, MP1 calls $0.50, <font color="#666666">1 fold</font>, MP3 calls $0.50, <font color="#666666">1 fold</font>, Hero calls $0.50, SB (poster) completes, BB checks.

Flop: ($2.50) 3[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, MP1 checks, <font color="#CC3333">MP3 bets $1</font>, <font color="#CC3333">Hero raises to $3.5</font>, SB folds, BB folds, MP1 calls $3.50, MP3 folds.

Turn: ($10.50) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero bets $7</font>, MP1 calls $7.

River: ($24.50) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero bets $10</font>, MP1 raises to $30.15 (All-In), Hero ?