[Wintermute]

You say they both seem tight postflop. I'm nearly 100% sure that someone holds the broadway straight here if that's the case; having the Q "blockers" doesn't amount to sh!t given this action.

So it looks to me like you're falling back on a Q-high flush draw, and even though 2 outs give you the mortal nuts, I'd prefer to let this go when the action comes around a second time, despite the good pot odds; if they were loose postflop, then maybe you could justify drawing to a 3rd nut flush given the odds you're getting.

Of course, in the moment, I might be tempted to raise (since if you call you're committed) if something seemed fishy about the timing of the bets, the previous hand went strangely, etc.

But looks like a pretty easy fold after the fact.