What do I seek from my cuckold fantasy?

It isn't a fantasy for me, it's reality, but I seek growth, further shared thrilling experiences with my wife. To satisfy my love of seeing her well fucked, from a more distant viewpoint.

What sorts of things would you find most arousing in a cuckold experience?

So far, the things that have aroused me the most have been the unexpectedly sharp feelings of danger and the (I think small) chance of losing her. I get a real adrenaline rush off that. Also the small things - her treating him exactly as her boyfriend, because he is. The gestures, smiles, touches. The increasing affection and depth of feeling they have for each other.