Shall I slow play here?

[bigsea]

It is a full table. Everyone calls. I had A[img]/images/graemlins/spade.gif[/img] Q [img]/images/graemlins/club.gif[/img] Q [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/heart.gif[/img].

The flop came A [img]/images/graemlins/diamond.gif[/img] A [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/heart.gif[/img].
I checked, so did every one.

The river came a 8 [img]/images/graemlins/club.gif[/img], one guy potted it, I just flat called. The river came another eight, this guy potted again, what should I do?

You might guess that that guy held 88, and caught quad 8 in the river.

My question is whether I should slow play from the beginning? Or I should have reraised in the turn, but I believed that guy wouldn't pass either. So the only way I can escape is that I didn't slow play from the very beginning?

Any opinion?