NL100 Trip A's - river action?

Villain har spillet 38/20/1 over 80 hænder. Har ikke set ham smide hans SB væk endnu uden kamp.

Hvad burde vores action være på river? Det er vel enten call eller all-in?

***** Betfair Poker Hand History for Game 253588172 *****
NL $0.50/$1 Texas Hold'em - Thursday, September 20, 19:20:47 GMT 2007
Table Fluorine 02 6-max (Real Money)
Seat 1 is the button
Total number of active players : 4
Seat 1: HERO ( $100 )
Seat 2: VILLAIN ( $119.87 )
Seat 3: Golfer72 ( $113.15 )
Seat 4: vanky ( $93 )
Seat 5: billCosby ( $108.78 )
Seat 6: oric11 ( $48.85 )
VILLAIN posts small blind [$0.50]
vanky posts big blind [$1]
** Dealing down cards **
Dealt to HERO [ K♠, A♥ ]
billCosby folds
HERO raises to [$3.50]
VILLAIN calls [$3]
vanky folds
** Dealing Flop ** [ A♠, T♣, 8♠ ] pot = 8
VILLAIN checks
HERO bets [$5]
VILLAIN calls [$5]
** Dealing Turn ** [ A♣ ] pot = 18
VILLAIN checks
HERO bets [$15]
VILLAIN calls [$15]
** Dealing River ** [ 6♦ ] pot = 48
VILLAIN bets [$20]
HERO ?

Enig... All-in...

All u can eat baby!