When will my old cat start liking my new kittens?

I got 2 new male kittens(please don't ask where) a few days ago. We brought them home, and ever since my cat has been avoiding all contact with them. Whenever they're in the same room, she hisses and growls at them. She especially hates it when they are around her stuff like her Еда bowl and litter box. The kitties sleep in a big mesh tent in the living room, but the cat usually sleeps there, so we moved her to my brother's room.

The kittens' names are Tommy(on bottom) and Jerry(on top), and the cat's name is Whiskers. They're all sweet hearts :3

When's Whisker's gonna like the new members of the family?