What's optimal timing for an exposure, Exposure 101-style? After challenging WS or finding truth from WS? Or is it through the exposure that WS is supposed to learn of BS's knowledge?

I was pondering the timing etc of doing exposure to OM's Facebook contacts and WS's e-mail contacts/friends, when this new event occured:

Today wife sent me a txt message asking if I could drop her by the hospital, after picking her up from the train station after work. I said OK, and "what's up re hospital"? She replied (in part): "have infected stomach bloated and now sore...usual girl stuff so need antibiotics".

B*llsh*t.

At least, that's what my now-suspicious mind tells me, betting that either a) she's missed her period, or b) picked up a present from her recent solo trip abroad (a "treat" for her self for having landed a new job, five months on).

So. It's taking ALL of my self-restraint to NOT challenge her right now, when I go pick her up from hospital. I know that she'll argue back and deny. She has once or twice in the past also thrown in an "I don't care what you do, so you shouldn't care what I do", just for good measure -- and I wouldn't be surprised if she deployed that tonight as well.

But worst thing is I haven't done the Facebook exposures to OM's contacts, nor the email exposures to WS's friends. Having an outburst now will probably ruin my "tsunami of truth", hence my forcing myself to restraint. How do I hold my tongue?

So, back to my opening question, what's the best timing for an exposure, Exposure 101-style? After challenging WS or finding truth from WS? Or is it through the exposure that WS is supposed to learn of BS's knowledge?

Thanks. My stomach is in knots, and my heart-rate is up. :-)