it's none of your business
Se não te interessa é que não quer usar a cabeça.
If you're not interested, it's because you don't want to use your head.
— Pacto de Sangue (1944)
That's none of your business.
Não te interessa quem, tem ou não tem?
Does it interest you who has it or doesn't have it?
— Amor à Flor da Pele (2000)
This is none of your business.