Tough spot or am I seeing monsters?

[A_PLUS]

Stars 33$ R&A, about 70 left 30 or so pay

Villan is kinda loose, but more passive than agro. He has been limping way too much, but raising has been reasonable (hard to say for sure).

My image is basic, although, I did resteal from the button when a lag bet from the CO.

400/600 50a
UG+1 [15K](had limp-folded from EP before): limps
UG+2 [19K] makes it 3200
Folded to Hero in CO [22K] with AKo

The size of his raise scared the balls off me. Unless he is pretty bad, he has a very tight range here.

any thoughts?