$20/$40 hand

[drbk2]

I raised the river because of the guy in between who called and the fact that the guy in the big blind while timid usually, was on a rush and would be aggressive enough now to bet two pair. My friend who was sweating my hand thought the river raise was bad. I thought it was an ok raise as long as I could fold to a 3 bet. Just calling the river doesn't seem right here for some reason. I don't know. Perhaps someone could tell me why or why not.

Anyway the big blind 3 bet. Middle position cold called 2 more and I instantly mucked. big blind shows a flush, and the middle position flashes 87o and mucks.