100NL 4 to a flush

[ship_it_trebek]

Villain running 22/7/1.5 2.5 river AF. Is calling here spewy or is the overbet not always As? Should I blocking bet river then fold to raise?

Full Tilt Poker, $0.50/$1 NL Hold'em Cash Game, 8 Players
LeggoPoker Hand History Converter

MP2: $101.30
CO: $49
BTN: $185.55
SB: $105.55
BB: $43.30
Hero (UTG): $172.05
UTG+1: $77.85
MP1: $104.65

Pre-Flop: K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $4</font>, 4 folds, BTN calls $4, 2 folds

Flop: ($9.50) A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $8</font>, BTN calls $8

Turn: ($25.50) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $19</font>, BTN calls $19

River: ($63.50) 7[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $80</font>, Hero...

[Royale]

tough decision here..

[rdrr]

b/f river for ~40

[Royale]

Hes probably got an ace here but is it a spade?!