Villian is an unknown. Like this fold?

Party Poker No-Limit Hold'em, $ BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP2 ($55.70)
MP3 ($100)
Hero ($158.88)
Button ($86.38)
SB ($147.35)
BB ($177.77)
UTG ($87.56)
UTG+1 ($59.21)
MP1 ($99)

Preflop: Hero is CO with A, A. SB posts a blind of $0.50.
UTG raises to $3, 1 fold, MP1 calls $3, 2 folds, Hero raises to $11, 3 folds, UTG folds, MP1 calls $8.

Flop: ($26.50) 7, 8, 6 (2 players)
MP1 checks, Hero bets $20, MP1 calls $20.

Turn: ($66.50) K (2 players)
MP1 calls $68 (All-In), Hero folds.

Final Pot: $134.50