Straight flushes? Oh my!

This is known as a "Nutting Stone."

I'm mystified at how I made only one bet on this hand.  A little background on me: I get a little spicy when I see a bargain to enter a pot.  Hopefully that explains my speculative call.

$0.10/$0.20 table, effective stacks are $25 (I have $48.73 FWIW).  Folds twice to villain who opens for $1.  BTN calls and I call with Kc9c.

I flop magic: TdQdJd - straight flush.  I'm fairly certain this hits my opponent's range on the head so I check.  Of note, I have stone nuts; there is no drawing out on me with blockers up & down.  He leads for pot: $3.10.  I flat, considering raising will scare away villain.

Ah on the turn, $9.30 in the middle.  This kind of ruins my opponent's hand because unless he has AK, he's going to be less tenacious.  It unfortunately narrows down the hand for his value betting range.  I'm stuck: I can't bet here because I'll scare him, but I need him to have a precise combo.  I check. He checks :-(.

Hopefully, my check turn will make him comfortable because the 9c (an effective blank) falls on the river.  Still $9.30 in the middle.  In my head, I flip a coin: bet/check.  The coin flip lands on check - I'm hoping he finds he still may have value from his range - given that I've been 100% passive the whole hand.  Nope.  He checks through and I'm shown QhQs for a flopped set.

Okay - comments?  I don't need Monday morning quarterback comments; I'm looking for meaningful, "I flopped a straight flush and should have bet the turn or river because XYZ."  Lay 'em on me!

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The hand in question is linked here.