400 kinda lost against a reg underbetting turn

[Traumfabrik]

villian is tigh regular. Calling flop seems to be a mistake and i like this line. On the turn i get good pododds with possible flushdraw but his coldcall on the flop makes me suspicoius. River is imo easy fold without strong read. Comments on all streets appreciated.
Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $442.00
BB: $162.00
UTG: $660.90
Hero (CO): $439.00
BTN: $457.00

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] (5 Players)
UTG folds, <font color="red">Hero raises to $14.00</font>, BTN folds, SB calls $12.00, BB calls $10.00

Flop: ($42) Q[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (3 Players)
SB checks, <font color="red">BB bets $39.00</font>, <font color="red">Hero raises to $115.00</font>, SB calls $115.00, BB folds

Turn: ($311) T[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets $100.00</font>, Hero calls $100.00

River: ($511) J[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets all-in for $213.00</font>, Hero folds
Uncalled bet of $213.00 returned to SB

Pot Size: $511.00 ($3 Rake)