$0.50/$1 No Limit Hold'em Cash, 5 Players
CO: $244 (244 bb)
BTN: $100 (100 bb)
SB: $76.96 (77 bb)
BB: $100 (100 bb)
Hero (MP): $100 (100 bb)
Preflop: Hero is MP with Q

Q
Hero raises to $3.50, CO calls $3.50,
BTN folds, SB calls $3, BB calls $2.50
Flop: ($14) 2

9

J
(4 players)
SB checks, BB checks,
Hero bets $10,
CO folds,
SB raises to $20,
BB folds, Hero?
Turn: ($54) 5
(2 players)
SB bets $25, Hero?
Villain was 43/24 over 13 hands, don't know anything about him yet, but notice his stack size.
Should i be worried? Is it more likely he has aces/set here than AJ?
He has 28.5bb left on the turn if you get that far in the hand.
How would you play KJ or AJ?