AA vs rival desconocido

Bueno, lo primero hola a todos, llevo poco tiempo jugando asi que no os metais mucho conmigo. Estoy con el trial de PT4, asi que de este rival no tengo manos. Iriais all-in o fold?

PokerStars - €0.02 NL (6 max) - Holdem - 5 players

Hero (CO): 50 BB

BTN: 133.5 BB (VPIP: 53.57, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 29)

SB: 106.5 BB (VPIP: 16.00, PFR: 14.29, 3Bet Preflop: 9.23, Hands: 181)

BB: 71 BB (VPIP: 60.71, PFR: 10.71, 3Bet Preflop: 0.00, Hands: 29)

UTG: 46.5 BB (VPIP: 100.00, PFR: 100.00, 3Bet Preflop: -, Hands: 1)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A:spade: A:club:

UTG raises to 3 BB, Hero raises to 7 BB, fold, fold, fold, UTG calls 4 BB

Flop: (15.5 BB, 2 players) 9:spade: 9:heart: T:spade:

UTG bets 7 BB, Hero raises to 18 BB, UTG raises to 39.5 BB and is all-in, Hero ???