Dad calls me while I'm in a meeting. I apologise to everyone and take the call. Dad is incoherent and obviously distressed.

'Your mum's disappeared,' he says.
'When did you last see her?' I ask.
'Just now,' he says. 'I've just come home and called you.'
'Where were you?'
'At the end of the road.'
'Which road?'
'This road.'
'Which road is 'this road' dad?'
'Our road.'
'Which end were you?'
'Not the top end.'
'Where it joins Corrie Road?'
'I don't know. She was there one minute...'
'What were you doing at the end of the road?'
'We just went for a walk!' he exclaims, as if something so quotidian has no right developing into something so traumatic.
'You went for a walk and mum just disappeared? How did that happen?'
'We got there...'
'Where, dad?'
'At the end of the road.'
'Right...'
'And your mum wanted to cross. So I crossed and waited for her, and she was nowhere in sight.'
'You mean you walked on and left her?'
'No!'
'Did she cross the road?'
'Yes!'
'And then what happened? Were you walking ahead of her?'
'No! We were just walking together.'
OK. At this point I realise we're getting nowhere. I know roughly where mum was last seen, and roughly how long ago. It will take me almost an hour to get there, so I need to call someone. It has to be either Regan, whose house is 10 minutes away by car, or the police. I call Regan's mobile, but she doesn't answer. I leave a message saying I will call the police in 20 minutes if I don't hear from her.

Meanwhile dad calls. Mum has been brought home by Emma, the lady next door, who found her at the shopping mall. He puts mum on the phone. I have to say that she sounds excited rather than frightened. She tries to tell me the whole story (meanwhile my colleagues are all eyes and ears, trying to figure out what is happening). It seems no harm was done.

The meeting starts again, only to be interrupted by Regan's call. It is a terrible line; I can hardly make out a word she says, so I simply say 'forget my earlier call, everything has been sorted out.'

So, questions...

Could this be the beginning of the wandering stage?
Will we ever hear the end of this from Emma, who is convinced she is the only person who cares about mum and dad?
Did mum do it on purpose?
How can dad be so hopeless as to lose mum on a quiet suburban street?