NL50 Calling this river raise with weak flush on paired board

[SuchaDonk]

NL50

The game just dropped down to 3-handed only a few minutes before this hand came up.

Villain is about 17/10.5/4.6 over about 150 hands.

In hindsight, I think my turn blocking bet was bad, as I had no good reason to expect him to not raise it.

Was I correct in making the river call?

Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($64.20)
Button ($67.15)
Hero ($50.70)

Preflop: Hero is SB with 6[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, Hero completes, <font color="#CC3333">BB raises to $2.5</font>, Hero calls $1.50.

Flop: ($4.50) 5[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $1.5</font>, <font color="#CC3333">BB raises to $4</font>, Hero calls $2.50.

Turn: ($12.50) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, BB calls $4.

River: ($20.50) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $15</font>, <font color="#CC3333">BB raises to $54.2 (All-In)</font>, Hero calls $25.70 (All-In).