Flopped set, flushed river

[bizaff]

Villain is 20/7.5/2.5 over 40 hands.

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) converter

Hero ($104.90)
Button ($158.05)
SB ($105.70)
BB ($27.15)
UTG ($100.50)
UTG+1 ($100)
MP1 ($150.20)
MP2 ($132.65)
MP3 ($99)

Preflop: Hero is CO with 7[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls $1, <font color="#666666">2 folds</font>, MP3 calls $1, Hero calls $1, <font color="#666666">2 folds</font>, BB checks.

Flop: ($4.50) K[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, UTG+1 checks, <font color="#CC3333">MP3 bets $4</font>, <font color="#CC3333">Hero raises to $15</font>, BB folds, UTG+1 folds, MP3 calls $11.

Turn: ($34.50) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP3 bets $10</font>, <font color="#CC3333">Hero raises to $40</font>, MP3 calls $30.

River: ($114.50) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP3 bets $43 (All-In)</font>, Hero...?

My main issue is the dorky turn raise - I need to push here I think.. anything bigger doesn't leave enough on the end to matter, anything smaller is losing value and giving odds.

As played, do I call the river?

Feel free to comment on all streets.