This is the norm for the African and Middle-Eastern diaspora, so I don't know why some of the Western diaspora guys in this thread make it out to seem like the wife should always be toiling away at housework. Or is it because hiring house help ruins their fragile idea of what a traditional marriage would look like?
She could be doing other things tbh, like staying fit by exercising and not being fat(god forbid), teaching the children, having more time for her husband, etc
I read it as him having a higher libido to the point that one woman wouldn't be able to satisfy him. In that case it would actually be a burden because you'de be trying your best to not commit zina.
In times like that, scholars would advise the man to take up another if he's able to.