NL200: Only two better hands would fold

[fooz]

Villain is 31/21/1.8 after 700 hands.
He/she has 31% WtSD%, and 73% folds to c-bet.

**

Party Poker
No Limit Holdem Ring game
Blinds: $1/$2
5 players
Converter

Stack sizes:
UTG: $137.80
CO: $137.72
Hero: $292.90
SB: $198
BB: $213.80

Pre-flop: (5 players) Hero is Button with 9[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/spade.gif[/img]
2 folds, Hero calls, <font color="#cc0000">SB raises to $9</font>, BB folds, Hero calls.

Flop: J[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] ($20, 2 players)
<font color="#cc0000">SB bets $11</font>, Hero calls.

Turn: 2[img]/images/graemlins/heart.gif[/img] ($42, 2 players)
SB checks, <font color="#cc0000">Hero bets $28</font>, SB calls.

River: 7[img]/images/graemlins/spade.gif[/img] ($98, 2 players)
SB checks, <font color="#cc0000">Hero bets $85</font>

**

Is the River bet worth it? Given the action so far I put him on AJ, KJ, or Ace-high flush draw.