someone else's affair

'Nothing wrong with prying, Victoria - as long as it's into someone else's affairs.

So, even if it isn't about that, people will be buying it for that, and to me, that's gaining on someone else's affairs.

It is human nature to advocate change in someone else's affairs whilst vigorously opposing its necessity in one's own.

Managing someone else's affairs - information from the Citizens Advice Bureau (Opens new window)