check-folding turn feels horrible, but the only other options mean a showdown (note villains stack size!) cos bet-fold is out of mind given villain stack-pot ratio.

Thoughts? is anything I beat calling?

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($50)
BB ($24.05)
UTG ($34.90)
UTG+1 ($17)
Hero ($52.05)
MP2 ($18.15)
MP3 ($53.40)
CO ($22.85)
Button ($53.45)

Preflop: Hero is MP1 with A, A. UTG posts a blind of $0.50.
1 fold, Hero raises to $1.75, 1 fold, MP3 calls $1.75, CO calls $1.75, 3 folds.

Flop: ($6) T, 5, 9 (4 players)
Hero bets $3.5, MP3 folds, CO calls $3.50.

Turn: ($13) 5 (3 players)
Hero bets $46.8 (All-In),