That sounds odd. Who kills them self at someone else’s home?
Maybe she had been in a close personal relationship - one that ended - with the homeowner.
Spurned lovers often kill themselves at the home or workplace of the ones who rejected them.
I'm going to guess there is more to this particular story>
In many cases, someone who had a personal relationship with the someone else, perhaps clandestinely, that didn't go so well, and as a result is perfectly happy to mess up that person's life as well.
A parting gift, as it were.