QK flops top 2, board gets bad

[acesover8s]

2-5 live. My opponent in this hand is the big blind, he has gone through about a grand, but hasn't shown a hand. He lost a big one to a rivered nut flush, but his opponent had TPTK anyway, so I can't be sure that he had the best hand or not.

Anyway, 3 limpers. I complete in the SB with KQo, BB checks. Flop comes KQ4 with 2 diamonds. I bet 20$ and only BB calls.

Turn is an Ace, making 2 flush draws. I bet $65. He pauses for about 40 seconds and calls.

The river is the 5 of diamonds. I check, he gets very talkative all of a sudden. "You didn't like that Ace, huh" and then bets 200$ into the 195$ pot.

Easy fold, right?

Should I have made a blocking bet?

[Big_Jim]

Stack sizes?

With deepish stacks, a block bet would have been nice, insofar as you don't think he would see it for what it is and raise with air. You're probably beat here, though, so fold.

Hard to think of any hand that he gets here with that you're ahead of that he doesn't check behind.

[Requin]

A block bet looks good there. Anyways, even without his chatter I'd probably fold, but it really sounds like this guy wants a call.

[sdplayerb]

easy fold...a blocking bet will just be lost money.