50NL - TT facing bet on scary board from complete donk

[mookboi]

Hand in question:

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $19.60
BB: $25.50
Hero (UTG): $89.35
CO: $54.70
BTN: $29.15

Preflop: Hero is dealt T[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/diamond.gif[/img] (5 Players)
<font color="red">Hero raises to $2.00</font>, CO calls $2.00, 3 folds

Flop: ($4.75) 6[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $3.25</font>, CO calls $3.25

Turn: ($11.25) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $9.00</font>, CO calls $9.00

River: ($29.25) 7[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $15.00</font>, Hero ?

READS: Villain is unknown in PT, but as shown below is an obvious retard:

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $14.95
BB: $20.25
UTG: $13.50
MP: $39.05
Hero (CO): $54.50
BTN: $68.85

Preflop: Hero is dealt J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img] (6 Players)
2 folds, <font color="red">Hero raises to $2.00</font>, BTN calls $2.00, SB folds, BB calls $1.50

Flop: ($6.25) 5[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, <font color="red">Hero bets $4.25</font>, BTN calls $4.25, BB folds

Turn: ($14.75) J[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $8.25</font>, BTN calls $8.25

River: ($31.25) K[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $20.00</font>, BTN calls $20.00

Pot Size: $71.25 ($3 Rake)

BTN had K[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (two pair, Kings and Jacks) and LOST (-$34.50)
Hero had J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img] (four of a kind, Jacks) and WON (+$33.75)

Oh, and he also has a small fluffy dog avatar which makes me think he's a pussy.