25NL: KK OOP 3bet Multiway Pot

[BooG690]

http://weaktight.com/1324427

BU is 56/4/0.9 over 49 hands w/ 40% (5 hands sample) fold to cbet
Only 2 hands on MP

$0.1/$0.25 No Limit Holdem
7 players
Converted at weaktight.com

Stacks:
UTG ($14.75)
UTG+1 ($25.00)
MP ($53.50)
CO ($8.00)
BTN ($37.30)
SB ($25.00)
Hero (BB) ($25.00)
[UTG+1 posted $0.25]
[CO posted $0.25]

Pre-flop: ($0.85, 7 players) Hero is BB
1 fold, UTG+1 checks, MP calls $0.25, CO checks, BTN raises to $0.75, 1 fold, Hero raises to $3.25, UTG+1 folds, MP calls $3, CO folds, BTN calls $2.50

Flop: ($10.35, 3 players)
Hero checks, MP checks, BTN bets $2.50, $2.50 to Hero ($21.75)?

1) How is my 3bet-sizing here?
2) How big of a mistake was it NOT to "cbet" here (it obviously got me into this spot)?
3) Is BU's bet ever a bluff here?

Assuming We Called
4) What is our plan if MP folds and a rag peels on the turn?
5) What is our plan if MP calls and a rag peels on the turn?

I think the 3b size is good vs. fish
I would cbet because the fish will peel a lot of draws, 9x and still probably calls with QQ-TT because they feel like big hands

if we call here, just proceed with caution and I wouldn't call any more than like 1/3 pot on the turn

[Carroters]

Yeah given his fishiness, there's no reason to think he'll barrel a turn with any range that we do remotely well against, c/f turn.

Flop (3) - In my experience if these stationy fish ever do bluff, it's usually a retarded small bet like this. i mean not saying we're ahead of his range here, but getting 10/1 there's enough chance this is a bluff or some randomly pointless fish bet with like 1010 or something to peel. Especially when we expect him to play straigthforwardly and fishy on the turn and river.

[XTR1000]

3b sizing is fine, now c/f flop.

[Fnord]

For god sakes, don't fold!