River my Flush and madness breaks out

[Lostit]

What would you do in this spot. I make my flush on the river and the PFR, who is 23/23/6 decides to push, and we're both deep stacked.

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

SB: $50.00
BB: $41.90
UTG: $96.55
CO: $24.90
Hero (BTN): $96.75

Preflop: Hero is dealt 4[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] (5 Players)
BB calls $0.50, <font color="red">UTG raises to $2.00</font>, CO folds, Hero calls $2.00, SB folds, BB calls $1.50

Flop: ($6.50) J[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/club.gif[/img] (3 Players)
BB checks, <font color="red">UTG bets $4.50</font>, Hero calls $4.50, <font color="red">BB raises to $9.00</font>, UTG calls $4.50, <font color="red">Hero raises to $28.00</font>, BB calls $19.00, UTG calls $19.00

Turn: ($90.50) 5[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, UTG checks, Hero checks

River: ($90.50) A[img]/images/graemlins/club.gif[/img] (3 Players)
BB checks, <font color="red">UTG bets all-in for $66.55</font>, Hero ????

I have $66 left (at NL 50).... do you call here?

Also, villains river aggression factor is an 8, but this kind of a bet is a little different than the rest.