Line for TPTK on monotone board OOP

[CobraGoat]

FullTilt .5BB 10handed.

Effective stacks are ~$50 with hero covering at $60.

Hero in SB dealt AcKc.

UTG+2 raises to 1.5. UTG+3 calls. Button calls. Hero calls. BB folds.

Pot is 6.5

Flop: Ks 8s 4s

Hero bets 5.5.

UTG+2 RR to 11. Folds to hero.

Action?

I had just sat down and have no notes on villain.

What am i hoping for with this hand at this point being that im OOP? Hero could have AK with A of spades. AA. FLopped the flush? Was very unclear here.