trips facing overbet in 3-bet pot

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This is a 3 handed game and villain is fairly aggressive. His stats are about 40/20/2 mostly ~5 handed play. I have seen him overbet before, and the one time I called a much smaller overbet (relative to the pot) he had unlikely nuts. However I have seen him overbet often enough and not get called that I'm pretty sure it doesn't just mean the nuts.


No Limit Holdem Ring game
Blinds: $2/$4
3 players
Converter

Stack sizes:
Button: $75.85
SB: $1.032.35
Hero: $758.40

Pre-flop: (3 players) Hero is BB with A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img]
Button calls, <font color="#cc0000">SB raises to $20</font>, <font color="#cc0000">Hero raises to $60</font>, Button folds, SB calls.

Flop: 6[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] ($116, 2 players)
SB checks, <font color="#cc0000">Hero bets $75</font>, <font color="#cc0000">SB raises all-in $972.35</font>, <font color="green">Hero?</font>