I could 3bet pre but bb was a whale and I suspect that's why UTG opened so large (he'd 3x'd his last couple of opens). I'm guessing he has a prett strong range and probably isn't doing this with hands like e.g. 67s.

Maybe I should overbet the turn since I expect most people to bet flop with flush draws and gutshots, but it's possible he checks them back sometimes. When he raises this size it seems like his most likely hand is AA, but I think I have too much equity/implied odds vs a reasonable range to fold here. What do people think? If you aren't folding, call or shove?