Flop a set 3-way, turn completes everything

[AE6]

PokerStars No-Limit Hold'em, $4 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($533.30)
MP ($24.65)
CO ($121.60)
Button ($249.45)
SB ($412)
Hero ($457.60)

Preflop: Hero is BB with 5[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises to $16</font>, <font color="#666666">2 folds</font>, Button calls $16, <font color="#666666">1 fold</font>, Hero calls $12.

Flop: ($50) K[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $36</font>, UTG calls $36, Button calls $36.

Turn: ($158) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG checks, <font color="#CC3333">Button bets $80</font>, Hero calls $80, UTG calls $80.

River: ($398) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG checks, <font color="#CC3333">Button bets $117.45 (All-In)</font>, Hero calls $117.45, UTG folds.

Final Pot: $632.90

So is this fine? River call feels kinda meh, but I'm getting like 4:1 at that point.

[mwalsh2020]

you were shown the nut flush weren't you? a8 of spades?