Can a housewife be a feminist? Of course!
A feminist is someone who believes in gender equality— which is completely separate from their gender performance. There’s nothing wrong with conforming to traditionally feminine or traditionally masculine roles… Or rejecting both.
An easy way to think about it is that you should stand up for other people’s gendered choices, even when you wouldn’t make the same ones. It’s about opening doors, not closing them.
Think of it this way:
What’s between your legs shouldn’t determine how you live your life.