When she put the key into the lock, Kate had a second of hesitation, but she pushed it in and twisted it immediately afterward.
With a click, the door opened.
The place was quiet and peaceful like the last time she had come there.
The files she copied from Tristan's computer, after an initial check, turned out to be mostly bookkeeping files and contracts of recent years. But she had been told that his company's operation in recent years was normal and the illegal activities should have happened way back, in the period where the original capital was accumulating.
So she thought of this apartment. He told her that he moved out of here five years ago. And this was a place with special significance to him.
When one was into something, one usually was obsessed or paranoid about it. This task she took on was possibly motivated by ethical concerns, or her curiosity or pregnancy hormones now made her feel like she was possessed by Sherlock Holmes.