I thought nobody knows.. and here I am wondering of that amount of panties he owned and no one in his family knows he's gay?.. I'm like.. who wash the laundry?ლ(´ڡ`ლ)
I think the brother did most of the house work because he mostly looked after the sister. But, when she got older she also taking care of herself and her brother now. But, yeah. since little. I think she already knew or had a feeling that they'd get together.
the sister was the first one to expect them to be together i think or didn't mind them being together. I like the sister character.
the sister knows XD lolol