Life is complicated. So our the relationships we forge with people. I do not condone the mistreatment of others. And it saddens me to read this, but we all have darkness inside of us, even if a little. It can be tough co-existing, especially with those we love very much. I guess I just wanted to see the joy but you are not wrong in pointing out that Sasha is human. Quite.
And as the other commenter mentioned, there was an abundance of love in that relationship too. That much is evident.
https://en.wikipedia.org/wiki/PiHKAL https://en.wikipedia.org/wiki/TiHKAL
It's a fascinating read about the chemist Alexander Shulgin
https://en.wikipedia.org/wiki/Alexander_Shulgin