100NL 6m AA against what looks like 2 pair

[Gobgogbog]

Villain as new to me. The flop bet size was a mistake-- I thought the pot was $6 and this was a 2/3 bet. More commentary at the end.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
UTG: $52.25
UTG+1: $86
CO: $59.90
Button: $244.15
Hero: $113.70
BB: $36

Pre-flop: (6 players) Hero is SB with A[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img]
4 folds, <font color="#cc0000">Hero raises to $3.5</font>, BB calls.

Flop: 6[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/spade.gif[/img] ($7, 2 players)
<font color="#cc0000">Hero bets $4</font>, BB calls.

Turn: K[img]/images/graemlins/club.gif[/img] ($15, 2 players)
<font color="#cc0000">Hero bets $10</font>, <font color="#cc0000">BB raises all-in $29</font>. Hero ???

I figured him for K7, maybe K6. Against those hands, I need just over 4:1 to call, and I'm getting just under 3:1. I figured the chance he has AK or maybe even KQ and thinks I'm full of it might make up for it. I figured sets were more likely to let me put the rest of the money in on my own, but now that I'm away from the table I think that's some flawed logic.