KK, and a ace on the flop

[Archon_Wing]

Ahh, I've played very little poker this past month, and haven't really seen any interesting hands. Posting these hands for a sanity check.

Villain is about 38/8/2.67

Full Tilt Poker
No Limit Hold'em Cash Game
$0.10/$0.25 Blinds
5 Players
LegoPoker HH Converter

<font color="black"> Hero (SB): $25.55 </font>
BB: $33.80
<font color="black"> UTG: $37.80 </font>
CO: $24.70
BTN: $30.55

<font color="black"> Preflop: </font> Hero is dealt K[img]/images/graemlins/spade.gif[/img] K (5 Players)
<font color="red"> UTG raises to $0.85 </font>, 2 folds, <font color="red"> Hero raises to $2.70 </font>, BB folds, UTG calls $1.85

<font color="black"> Flop: </font> ($5.65) A 4 6[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red"> Hero bets $4 </font>

Is continuation betting here really worth it? I don't think I can get a better hand to fold or a worse hand to call can I? Should I bet a little less?

Another hand. Not much info, except both villains are pretty nitty.

Full Tilt Poker
No Limit Hold'em Cash Game
$0.10/$0.25 Blinds
5 Players
LegoPoker HH Converter

<font color="black"> SB: $11.25 </font>
<font color="black"> BB: $31.75 </font>
<font color="black"> Hero (UTG): $28.60 </font>
CO: $33.50
BTN: $24.35

<font color="black"> Preflop: </font> Hero is dealt K[img]/images/graemlins/heart.gif[/img] K (5 Players)
<font color="red"> Hero raises to $1 </font>, 2 folds, SB calls $0.90, BB calls $0.75

<font color="black"> Flop: </font> ($3) 4 A 9 (3 Players)
SB checks, BB checks, Hero checks

<font color="black"> Turn: </font> ($3) 7 (3 Players)
SB checks, BB checks, <font color="red"> Hero bets $1.75</font>

Contbet against more than one villain seems spewy. Do I bet the turn or do I peel?