1/2 NL. Three hours into session. Ten handed.
Hero (UTG, $550): Hero has a TAG image. Out of the ten people at the table, it's a mixture of six tight players and four loose, and a combination of tight aggressive, tight passive, loose aggressive, loose passive. Hero hasn't shown down too many hands, but the ones he has shown down have been strong.
Villain (MP1, $400): Villain is a reg that hero plays with. Villain is one of the tightest players hero plays with, with the exception of one reg and an occasional super NIT. Villain has played around ten hands so far today and notably won an all in pre flop with KK vs AA when he rivered a straight. Villain usually doesn't show too much aggression unless he's confident he has the best hand. Villain usually only plays big cards, but will occasionally play suited connectors or suited aces from the BTN only when there's already 3+ in the hand.
OTTH
Hero is dealt A
K
and opens to $10. Villain calls, BTN calls and SB calls.
Flop ($42): K
10
5
SB checks and hero leads out for $21. Villain raises to $50 and everyone folds, except hero who flats.
Turn ($142): K
Hero checks and villain bets $85. Hero?