5 handed game.

I raise utg 7, hj flats, button flats, sb calls, bb squeezes 30 (bb is loose aggro, likes to squeeze & 3bet).
I call, HJ/button fold, sb calls (loose tricky).

Flop 
6c Kh Kd

I have Ac Kh Qc Jd.
sb has ~500. I have 355 now, bb has ~500

Sb donks into field, 45$. BB flats, I make it 150. sb thinks for quite a long time and flats, now bb folds.

Turn 7c

He checks, I fire rest. 205. he calls and shows 66xx rough ones like 66T3ss

It was weird, on the turn i felt like he had 66xx too. For some reason I didn't think his range was weak Kings like Kxxx. On the turn, I thought he didn't like his hand, I probably should of gave up and took a free card, but I didn't want to give outs to Kxxx's that I beat. I wanted him to believe I might have K7 or K6xx and fold, he didn't immediately call, he seemed like he hated it, he said out loud, "well I dont think i can fold a full house", then called after about a 45s staredown.

In my head i was trying to debate if I should ask him if he had 66 during the staredown after his speech. I decided to stay quiet and not say anything.