nl100 - overpair vs BB, board pairs on turn

[offTopic]

This may be super-standard, but I'm very inexperienced at NL, so please bear with me...

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 9 Players - (LegoPoker Hand History Converter)

SB: $93.25
BB: $104.35
UTG: $102.95
UTG+1: $99.60
MP1: $215.10
MP2: $27.45
Hero (MP3): $135.20
CO: $37.05
BTN: $19.00

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] (9 Players)
UTG folds, UTG+1 calls $1.00, 2 folds, <font color="red">Hero raises to $4.00</font>, CO calls $4.00, 2 folds, BB calls $3.00, UTG+1 calls $3.00

Flop: ($16.50) 3[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (4 Players)
BB checks, UTG+1 checks, <font color="red">Hero bets $16.00</font>, CO folds, BB calls $16.00, UTG+1 folds

Turn: ($48.50) 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero...