Action with Jacks an' I'm confused at the $109s

[nuclear500]

He's betting into 3 people in a fairly big pot and that bet is called.

I'd say you're looking at a set or slow played AA or KK from SB or MP1. I can't see AT or an under pair to the Tens making this play because he can't call a raise.

SB has pot committed himself by making the bet, he has over 50% in. He will definately be going to the river.

I fold, unfortunately.