PFR is some 25-12 weak player with about 70% fold to 3b and 10% 4b. 37% flop cbet, 60% turn cbet. SB is an aggro 14-12-6 type who likes to squeeze, bb is an unknown who started with about 50bb and who is like 38-11 plus has squeezed once already (won without showdown) in 20 hands.
Preflop I choose to flat, flop and turn both feel like interesting spots, what's my play?

Full Tilt No-Limit Hold'em, $0.25 BB (9 handed) - Full Tilt Converter Tool from http://www.flopturnriver.com

UTG+1 ($39.21)
MP1 ($25)
MP2 ($25.05)
MP3 ($62.16)
CO ($18.91)
Hero (Button) ($52.02)
SB ($28.08)
BB ($13.45)
UTG ($25.25)

Preflop: Hero is Button with K, K
2 folds, MP1 raises to $0.75, 3 folds, Hero calls $0.75, 1 fold, BB calls $0.50

Flop: ($2.35) 5, 2, 8 (3 players)
BB checks, MP1 bets $1.50, Hero calls $1.50, BB calls $1.50

Turn: ($6.85) 6 (3 players)
BB bets $11.20 (All-In), MP1 calls $11.20, Hero raises to $49.77 (All-In),