NL50, TPTK + nfd - easy call?!

[LRG]

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Button ($28.60)
SB ($49.20)
BB ($50.90)
UTG ($88.70)
Hero (MP) ($50)
CO ($50.75)

Preflop: Hero is MP with J, A
1 fold, Hero bets $1.75, CO calls $1.75, 3 folds

Flop: ($4.25) 4, 2, J (2 players)
Hero checks, CO bets $49 (All-In), Hero?

Turn: ($100.75) 7 (2 players, 2 all-in)

River: ($100.75) 4 (2 players, 2 all-in)

Total pot: $100.75 | Rake: $3

easy call ohne reads?!