So. Starting stack 20.000 chips. blinds 400/800. 7 handed. utg +1 (pretty active, solid online reg, big stack, pretty aggro) opens to 1700. folded to me OTB with A7s. My image till then was pretty TAGish, opened some hands, 3betted some, not too much history with him. eff stack 32.000, he covers. I decide to 3bet to 3900. folded to him, he thinks about 10-15 secs and 4bets to 7800. getting really good odds and the fact that he has been all over the place opening and 3-4betting, i decide to flat. Flop A78 rainbow. Pot is like ~17.500. He checks. I bet 5.100, he calls relatively fast. Turn comes another 8. Pot is ~28.000, i have ~17.000. He checks, I check. River is a blank 3. he shoves. HERO ? ? ? ?

fold vs his 4bet? as played? am i ever ahead OTR? dont think he would bluff his QQ/KK potentially?

would love to get some insight on this.

Thanks