A7 flopped two pair 25NL

[Vinetou]

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP3 ($21.40)
CO ($25)
Hero ($40.60)
SB ($9.75)
BB ($31.70)
UTG ($62.15)
UTG+1 ($20.30)
MP1 ($41.45)
MP2 ($46.15)

Preflop: Hero is Button with 7[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
UTG calls $0.25, <font color="#666666">5 folds</font>, <font color="#CC3333">Hero raises to $1.25</font>, <font color="#666666">2 folds</font>, UTG calls $1.

Flop: ($2.85) 7[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $1</font>, <font color="#CC3333">Hero raises to $4</font>, UTG calls $3.

Turn: ($10.85) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $7.75</font>, <font color="#CC3333">UTG raises to $36</font>,

Anyone of you checking behind here? In this case, do you always call the checkraise or do you even consider doing something other than that? Obviously I can't put this opponent on a hand I don't beat. With AK, he would raise preflop, maybe a set of 7 but it is unlikely because I have one. And he is a donk.