4 limpers including Sunny Mistri who's limped the button. I complete from the SB with

big blind checks. I'm playing 900, Sunny covers.
Flop (12)

I bet £10, one caller, Sunny calls
Turn (42)

I bet £25, fold, Sunny thinks and slides in a stack of reds (100) I tank and call.
River (242)

I check, Sunny bets 210. I?
Are we calling or folding here? Shoving seems fairly sexy also. I don't think he'd have a flush here very often at all unless it's KTcc or T8cc.
Think his value range doesn't include any sets/two pairs.
He can show up with a bluff here though.
That's all.