opens with raise, call, re-raise .. no stats but button is fairly tight .. correct to fold here?

Full Tilt No-Limit Hold'em, $1.00 BB (6 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

MP ($293.65)
CO ($153.30)
Button ($117.60)
SB ($100.50)
Hero (BB) ($102.40)
UTG ($102.90)

Preflop: Hero is BB with A, K
1 fold, MP bets $3.50, CO calls $3.50, Button raises to $15.50, 4 folds

Total pot: $12 | Rake: $0

Results:
Button didn't show
Outcome: Button won $12