unethical or just business?

[chezwiz75]

I was playing some 2-5 no limit. I had limped and called a raise with AK and would be second to act post flop. Flop was 10 8 2. BB checked I checked raiser made it $25. BB folded as I was pondering a call the raiser must not have known I was still in the pot, flipped over AK to show the BB what he had. Dealer tells him I am in the hand as I am in the process of calling. Dealer calls floor and the guy wants to just give me the pot (which I have no objections to). However the dealer says that we can just play it out. He deals the turn a jack and I bet $20 knowing that he would have to fold. To my suprise he calls and says he might as well see if he can get an ace or a king on the river, which I was planning on check raising all in if he did. How would he be able to call that knowing that I know what he has. So the river was a blank for the both of us and I bet $40. He folded. So was it right to continue to bet to take advantage of his mis-step or just good business?