Thief of Time - Door

She also spent a little while going through Madam's private papers, and this has to be said about Susan: it did not occur to her that there was anything wrong about this, although she'd quite understand that it was probably wrong if you weren't Susan Sto Helit, of course. The papers were in quite a good safe that would have occupied a competent thief for at least twenty minutes.

The fact that the door swung open at her touch suggested that special rules applied here. No door was closed to Miss Susan. It ran in the family. Some genetics are passed on via the soul.

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The Thief of Time - p77