suspicious

I wonder if I should worry when I find notes like the following on the table by the front door? M has this tendency to accumulate little bits of paper with notes on them, but surely this is taking it too far?

Apparently Boyo had a date at the movies tonight. Bastard.

(I suppose it's easy for me to make jokes about his likelihood of having an affair when it is so very, very unlikely. I mean, I say--as does everyone--that my spouse wouldn't cheat on me but actually, I'm currently feeling fairly confident about it in any case because when would he have TIME? We are perhaps a touch co-dependent and are almost never apart except while at work.)