River 3Bet all In.... Is this always an instacall?

[tomonbass]

Havent Seen Villain do anything stupid seems quite solid..
Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter (http://www.neildewhurst.com/hand-converter)

Stack sizes:
UTG: $66.95
UTG+1: $64.90
CO: $19.45
Tomonbass: $120.20
SB: $61.25
BB: $51.70

Pre-flop: (6 players) Tomonbass is Button with T/images/graemlins/spade.gif 9/images/graemlins/spade.gif
<font color="#cc0000">UTG raises to $1.75</font>, 2 folds, Tomonbass calls, SB calls, BB folds.

Flop: 2/images/graemlins/diamond.gif K/images/graemlins/heart.gif J/images/graemlins/club.gif ($5.75, 3 players)
SB checks, UTG checks, Tomonbass checks.

Turn: Q/images/graemlins/spade.gif ($5.75, 3 players)
SB checks, <font color="#cc0000">UTG bets $3</font>, Tomonbass calls, SB folds.

River: 3/images/graemlins/spade.gif ($11.75, 2 players)
<font color="#cc0000">UTG bets $7</font>, <font color="#cc0000">Tomonbass raises to $18</font>, <font color="#cc0000">UTG raises all-in $62.2</font>, Tomonbass ?

Do you always go broke here if behind or are most villains likely to get there money in with less than the nut straight?

[Jay Riall]

For the love of god raise the turn. Yes I'm going broke on the river. Sets/2-pairs are just as likely as AT here.

[Sir Winalot]

I raise turn to 12, the river to 25 and instacall his all-in. You lost to AT, yeah it sucks but is totally BBV.