$10 HU SNG, bad call?

Based on reads (more post flop than pre flop) I thought SB had an ace. I ended up calling. But should of folded. Right?


PokerStars No-Limit Hold'em, 10.5 Tournament, 30/60 Blinds (2 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (BB) (t5040)
SB (t960)

Hero's M: 56.00

Preflop: Hero is BB with K, 2
SB bets t120, Hero calls t60

Flop: (t240) J, A, 3 (2 players)
Hero checks, SB bets t120, Hero calls t120

Turn: (t480) 2 (2 players)
Hero checks, SB bets t720 (All-In), Hero ??