I'm sure you right - it could get addictive.
You see her blowing another guy, then of course - you want to see her getting fucked. Then - could she suck two guys at once? I bet she could. You'd have to see her getting spit-roasted. And it would soon be time to arrange her first DP ... perhaps with your own cock fucking her mouth just to complete the scene. Hmm - and another idea: those guys in the local football club - why not invite them to form a line with your wife at the far end, on her knees.
I can imagine that's the direction it would go. Taking it further each time.