25NL
Hero - UTG+1 ~$30
Villain - CO ~$20
Hero has
Folds to Hero
Hero raises to $1.50
Folds to Villain
Villain calls
Folds to Hero
Flop Pot = $3.35
Hero bets $3.35
Villain raises All-In
Hero?

No reads. Is betting the flop good? Will weaker aces call enough? Does a hand with a 4 make this raise often?