.50/1NL river gone wrong

[.xxxx.]

after getting villain to call 11 into an 18 pot, if villain is not on a draw how often are they trying to end it on the turn with a medium strength hand?

villain was very agg, did not fold, didn't show down often

what's a better line throughout?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
2 players
Converter

Stack sizes:
SB: $124.50
HUn00b: $76

Pre-flop: (2 players) HUn00b is BB with K[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">SB raises to $3</font>, <font color="#cc0000">HUn00b raises to $9</font>, SB calls.

Flop: 7[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/club.gif[/img] ($18, 2 players)
HUn00b checks, SB checks.

Turn: T[img]/images/graemlins/diamond.gif[/img] ($18, 2 players)
<font color="#cc0000">HUn00b bets $11</font>, SB calls.

River: A[img]/images/graemlins/club.gif[/img] ($40, 2 players)
<font color="#cc0000">HUn00b bets $25</font>, <font color="#cc0000">SB raises all-in $104.5</font>, <font color="#cc0000">HUn00b calls all-in $31</font>.
Uncalled bets: $48.5 returned to SB.

Results:
Final pot: $152
<font color="#ffffff">SB showed 3c 4c</font>
<font color="#ffffff">HUn00b mucks Kd Ad</font>