Aces cracked

Can I get away from this? Put the guy on AK for some reason, which seems odd since I had two aces.

Stacks:
UTG with $39.60
UTG+1 with $75.95
MP1 with $95.25
MP2 with $49.45
Villain with $50.00
BTN with $71.05
SB with $49.50
BB with $10.35

Site: Full Tilt Poker
Dealt to UTG+1:A♣ A♦

Preflop:
UTG calls [$0.50]
UTG+1 raises to $2
2 players fold.
Villain calls [$2]
4 players folded.
Total folds this street: 6
Potsize: $5.25

Flop: K♥ 5♦ J♣
UTG+1 bets [$3]
4 players fold.
Villain raises to $8
UTG+1 calls [$5]
Potsize: $21.25

Turn: 6♠
UTG+1 checks
Villain bets [$13]
UTG+1 raises to $40
Villain calls [$27] [ all-in ]
UTG+1 shows : A♣ A♦
Villain shows : 5♠ 5♣
Potsize: $101.25

River: 2♦
UTG+1 shows a pair of Aces
Villain shows three of a kind, Fives
Villain wins the pot ($98.25) with three of a kind, Fives