Great flop, but Villain takes lead from me?

[DesertCat]

5-150 spread limit, closest thing to NL in Arizona. Villian seems a solid player, aggressive and on a hot streak, tripling max buyin ($350) in about an hour. He's snapped off a few bluffs, but shown few hands. I'm on a cold streak during the same time to drop me almost back to the max buyin, and have a table image of "crap hand raising, flop bluffing, loser".

I get AKo on the button after an UTG limper. I make it 20. Villain is BB, calls, and limper calls. Flop comes KT5, rainbow. BB bets $40? UTG folds.

I get the vague notion that I'm either way ahead (KQ) or way behind (KT). I decide to call. Turn is another K, completing the rainbow. BB bets $75. I'm happy until I realize the card doesn't really help me. In fact, it makes it more likely I'm behind 55 or TT. Once again, I figure it's better to call so I don't lose a worse hand.

How's my line?