Folding middle set

[Tryptamean]

Stars 15-30

Played this hand last night, just summarizing from memory.

HJ is something like 35/20/2 over small sample, no notes
BB is fishier, something like 40/15/1.5. I have couple notes: I've seen him semi-bluff a turned second nut flush draw HU, and also played a flopped gs + fd passively. Not really sure what his semi-bluffing frequencies are, but he's capable of it.

HJ opens, Hero 3bets 66 OTB, BB calls 2, HJ caps, all call.

Flop: Q64 with a flush draw
BB checks, HJ bets, Hero Raises, BB calls, HJ 3bets, Hero caps, BB calls.

Turn: K no flush
BB checks, HJ bets, Hero raises, BB now 3bets!, HJ caps, Hero folds.

As I mentioned, I have a limited read on BB about semi-bluffing, and his line is kind of BS, so I would certainly show down vs his aggression. However, I can't imagine HJ would overplay AA like this, and I put him on KK/QQ. I'm also looking at possible paying multiple bets on the river to showdown.

Is this ok, or should I try to get to showdown vs a relative unknown?