AA vs bet followed by all-in on flop

0.25/0.50 NL 9 players:
Two players in mid-position limp in. Hero is one off the button with As Ah. Raise to 2.50. Both blinds fold, both limpers call.
flop: 2c 3c 5s
villian 1 bets $8
villian two calls and raises $23.48 all-in
What to do?