Top 2, raise the turn?

[Wideout88]

2/4 Limit Holdem

I have A8o and limp in on the Button after 3-4 limpers in front, blinds call, about 6 handed to flop

FLOP Ad 8h 5h

checks to MP limper who leads out, folds to me, I raise, folds back to MP limper he 3-bets, I call,

Turn is offsuit 4 (Ad 8h 5h) 4s

MP leads out.... my action??

is this an obvious raise and see what he does or should I play it cautiously and just call the turn?