100NL AA SB line check

Villain is unknown. I really only beat bluffs and random donk hands by the river but I didn't think he'd smooth call both streets with a set on this board. His river bet looked to me like he didn't want a call, so I decided to disappoint him. Do I need a good read to make this call?

At the time I didn't put thought into the fact that I hold the Ah, lessening the chances that he was drawing to a flush.

Thoughts?

PokerRoom No-Limit Hold'em, $1 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

UTG+2 ($85.50)
MP1 ($131.10)
MP2 ($107.70)
MP3 ($4.50)
CO ($41.40)
Button ($119.00)
Hero ($99.00)
BB ($77.50)
UTG ($165.90)
UTG+1 ($99.00)

Preflop: Hero is SB with Ahttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, Ahttp://www.flopturnriver.com/phpBB2/...iles/heart.gif.
UTG calls $1, 7 folds, Hero raises to $4.5, 1 fold, UTG calls $3.50.

Flop: ($10) 3http://www.flopturnriver.com/phpBB2/...miles/club.gif, 9http://www.flopturnriver.com/phpBB2/...iles/heart.gif, 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
Hero bets $7, UTG calls $7.

Turn: ($24) 6http://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
Hero bets $20, UTG calls $20.

River: ($64) Qhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
Hero checks, UTG bets $60, Hero calls $60.

Final Pot: $184

interesting.
i put him on AQ/KQ/QJ at first glance.. then i put him on a missed flush draw.. his line doesnt seem like a set.. there are a lot of str8 possibilities out there, he could have one of those.. anyway, i like the line overall as you gave her a chance to bluff at the pot.

edit- ok i think KhQh is the case here, or some combo with Qh.