AKs 2/4

[Hensa]

I have just played this hand and do not feel confortable about the right way to play it.

5 handed:
Seat 1: Hero ($504)
Seat 2: UTG ($80)
Seat 3: Villain ($432)
Seat 4: MP ($452)
Seat 5: CO ($324)
Seat 6: Button ($194)

I have A [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/diamond.gif[/img]
UTG donk limp, Villain ( 33/22/3 with about 110 hands) raise to 18. I guess everybody will suggest to raise preflop but on a donks site I think my play is possible here.
UTG donk call.

Flop : 2 [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/diamond.gif[/img] 8 [img]/images/graemlins/diamond.gif[/img]

So, I get this interesting flop and don't know what is the best play here.
If I check , donk check and hero Pot it, I can check raise but I am exposed to an allin ...
If I raise the first, well why not, but isn't it a little artificial ?

Any help appreciated.