NL10- KK oop smooth called PFfacing turn bet

[KillaJaffeJO]

Villian is 55/30
i had just taken a pot off of him when I shoved with A7 on a 7 high flop and he called with AK. What is my turn action?
Ultimate Bet - No Limit Hold'em Cash Game - $0.05/$0.10 Blinds - 4 Players - (LegoPoker HH Converter)

SB: $9.90
Hero (BB): $21.91
UTG: $25.79
BTN: $23.77

Preflop: Hero is dealt K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (4 Players)
UTG calls $0.10, <font color="red">BTN raises to $0.45</font>, SB folds, Hero calls $0.35, UTG calls $0.35
Uncalled bet of $0.00 returned to BTN

Flop: ($1.40) 8[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/club.gif[/img] (3 Players)
Hero checks, UTG checks, <font color="red">BTN bets $1.40</font>, <font color="red">Hero raises to $5.60</font>, UTG folds, BTN calls $4.20

Turn: ($12.60) A[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $7.50</font>, Pot Size: $12.60 ($0.63 Rake)