UTG - Loose passive - 200bb
UTG+2 - Loose passive - 100bb
SB - Loose passive - 500bb *Raised utg with J3s to $15, flop FD on 862tt 3-way, and c/c flop (played passively with his draw). Read on villain is that he raises a weak range to $15 (SC's, suited gappers, high card/rag suited, few offsuit broadways) and raises all his strong hands (Big PP's, Suited Big cards, AK, AQ) to $20.
BB - Hero - 110bb - Ac7c

Preflop:
UTG limps, UTG+2 limps, SB raises to $15, BB raises to $55, UTG calls, UTG+2 calls, SB calls

Flop: KcQdTc
SB checks, Hero???

Should Hero A) Bet flop/shove turn B) Check flop. Based on action, Maybe check/ship all in. Maybe check/call.