20-40 Party, 5-handed KQs

[Michael Davis]

5-handed, opponent openraises from CO and I threebet with KQh.

I haven't been at the table long, and I have no stats on this opponent, but he seems very aggressive. Earlier he threebet with a pair of sixes on the turn, but it was good, and his opponent turned out to be a semimaniac, so I'm not sure that says much about this guy.

Anyways, this is probably a standard situation, but I think I'm getting it wrong everytime, so somebody answer with authority and tell me the right play.

Flop is Q85 with two clubs and I lead into him, he calls.

Turn is an offsuit Ace.

Is this decision even close?

-Michael