Posting in UK online forum, Mumsnet, the woman recounted the conversation that had taken place between her and her twelve-year-old son.
The mother decided to answer his blunt question openly and honestly, and noted that her son responded with embarrassment and humour.
The full exchange is shown below.
People instantly became divided, with comments ranging from praise to disgust to pure shock.
'I would have told him it wasn't his business,' wrote one person.
'Questions like that are inappropriate and answering them is even more inappropriate!' another wrote.
'It's not funny, or 'mortifying'. It's concerning,' someone added.
While others had a more positive outlook.
'At least your son knows his parents have a good relationship.'
Another wrote, 'You were open, honest and it's an absolute credit that your little boy feels comfortable enough to talk to you.'
A few were just shocked by the answer in general.
'I'm impressed with once or twice a week!' one wrote.
Another simply wrote, 'A WEEK?!?'
This article originally appeared on New Idea.