[Sharagoz]

Fold.
Unless you got a good read you cant call here. KJ, Q10, 55 are just too likely the way this went down. You've shown strength on 3 streets in a row, there's very little chance he's bluffing or semi-bluffing. A "multi tabling TAG" will rarely make that move.

I agree with checking the flop. You're either a small favourite or a big underdog if somebody calls.
Definatly check the turn after you bet the flop and got called. You might give a free card by checking the flop or turn, but you just have to do it to control the pot size. This is not a big pot hand.