Free showdown or value bet? Party 10/20

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BB here is 14vpip/9pfr/1.5 AF but only about 40 hands.

Comments on all streets welcome, but the river is my biggest question mark.


Party Poker 10/20 Hold'em (9 max, 9 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP3 with T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, BB calls.

Flop: (4.50 SB) K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, Hero calls.

Turn: (4.25 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>, BB calls.

River: (8.25 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero ??