Problem

I said to the wife 'I've got a problem.'

She replied 'No, we have a problem, we're a couple, we're married, we're a unit. Your problem is my problem we're in this together.'

Overwhelmed with relief I said 'it's hardly worth mentioning now.'

But she was insistent on knowing, 'what is our problem?'

I then had to explain to her that

Spoiler:

'we have got your sister pregnant!’