A married couple go on holiday, their plane crashes and they find themselves stranded on a deserted island; the plane had been going in the wrong direction for hours before crashing so there was no chance of discovery (why does this sound familiar?).
After recovering from the shock, helping the other survivors &c. the husband turns to the wife and asks, ‘Dear, did you remember to mail our taxes to the IRS?’
‘Sorry, dear, I forgot.’
The husband kisses his wife like he hadn’t done in years, then says, ‘They will find us!’