Semi-bluff my way to river flush, and villan bets out on paired board

[snowbank]

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

Hero ($208.85)
CO ($196)
Button ($179.03)
SB ($199)
BB ($120.18)
UTG ($284.90)

Preflop: Hero is MP with T[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img]. SB posts a blind of $1.
UTG calls $2, <font color="#CC3333">Hero raises to $10</font>, <font color="#666666">4 folds</font>, UTG calls $8.

Flop: ($23) 5[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $16</font>, <font color="#CC3333">UTG raises to $32</font>, Hero calls $16.

Turn: ($87) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $15</font>, Hero calls $15.

River: ($117) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $35</font>, Hero ???