A Sisterly Outing
So.  Dad was making her be nice to her extra-dimensional sisters.  Because that was what Summers did when relatives showed up from the four corners of creation.  For Rachel, that meant resisting the urge to fling Rose around with her TK powers no matter how annoying she got.

That she'd managed to succeed in resisting was nothing less than a miracle.  Rose seemed quite happy to try and push her and anyone else's buttons any chance she got.

Anastasia, at least, seemed all right, even if Rachel could barely bring herself to believe who her mother was.

So she knocked on her door.