This previous hand vs villain in same session for background:

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker Hand History Converter)

Hero (SB): $102.90
BB: $95.30
UTG: $99.50
CO: $189.95
BTN: $127.60

Preflop: Hero is dealt J J (5 Players)
3 folds, Hero raises to $4.00, BB calls $3.00

Flop: ($8) K 7 4 (2 Players)
Hero bets $6.00, BB calls $6.00

Turn: ($20) 9 (2 Players)
Hero bets $12.00, BB calls $12.00

River: ($44) 7 (2 Players)
Hero checks, BB checks

Pot Size: $44.00 ($2.20 Rake)

BB had J K (two pair, Kings and Sevens) and WON (+$19.80)
Hero had J J ([Jc Js] two pair, Jacks and Sevens) and LOST (-$22.00)
ok onto my lovely AK hand vs him:

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $98.50
BB: $191.45
UTG: $129.10
Hero (MP): $100.00
CO: $114.60
BTN: $98.50

Preflop: Hero is dealt A K (6 Players)
UTG folds, Hero raises to $3.50, CO calls $3.50, BTN calls $3.50, 2 folds

Flop: ($12) Q K 4 (3 Players)
Hero bets $8.00, CO raises to $20.00, BTN folds, Hero calls $12.00

Turn: ($52) 3 (2 Players)
Hero checks, CO bets $50.00, Hero?
Pot Size: $52.00 ($2.60 Rake)

He insta bet the fifty. Now based on the previous hand I figured this is not KJ or worse. But then I thought, he saw me bet the flop and turn before without even top pair, so perhaps he just doesnt respect me now. His PAHUD numbers were pretty standard. Thoughts?

Pretty easy fold IMO. I think you are chopping at best, but usually see KQ here. You are hardly ever ahead here especially given the fact its a rainbow flop, and hence there are no combo draws.

Yeah, fold turn.

Don't try to overanalyze the previous bvb situation's affect on this hand. This is KQ or 44 almost always.