DISCLAIMER. I only googled this 5 minutes ago. I'd verify this but listening devices are legal in the UK IF it's a public place or your own home. I don't think your W's car falls into that category but I'm not an expert.

And people miss type their passwords all the time if you get my drift.

Me:43 Her:42
M:14
S:9
EA started 2014/03 (or there abouts)
PA started 2014/05/30
BD:2014/11/05
I left 2015/10/01
I returned 2015/05/02
She left 2015/06/10
OM still on the go.