$50 Pot Limit good fortune continues

I hold AK both black under the gun and raise to two dollars. Three callers join me.

The Flop is KA7 with two hearts: The big blind checks and I'm not sure what to do. I figure that I'm not up against much and get greedy. Instead of betting the pot I decide to bet $3 and see if I can get a caller. The button calls.

The turn is a King of Hearts: Did he stick with me with a flush draw? If so, I couldn't have written a better script. I bet $6 to see if he'll come back at me. He just calls.

The river is a blank: I bet $15, hoping for a call. He raises to $30. I know he's got the flush. I re-raise to $45 and he raises me back his last $14.

I win $142