Janki Kripalani is a romantic fantasist. What she says does not make sense. I suspect she is not being honest. Remember, Dadi Janki tells BKs she has never lied. That may be true ... it is just that she is not clear and honest all the time but not being honest is apparently not the same as lying.
In the original teachings of this period that we have on record, there is no mention of God Shiva nor Piyu. There is no mention of Shiva until some date after 1950 we are as yet unclear about.
Therefore, I have to suspect that if they were calling anyone "Piyu" (beloved), it was Lekhraj Kripalani, aka "Prajapati God Brahma". Although in the early days they venerated the infinite divine light, there was no time when they called this conception of God, "the beloved", as say the Sufis would do. So what is she say, that a group believe God was speaking through this other person?
Now, from what we know, there could be truth to that. We have heard of the Piyu Vanis, the "Golden Circle", her sister perhaps being involved and the group leaving or being caste out. Janki does her usual of offering a tiny sliver of truth and then covering it up with distractions. How could Baba invoke Shiva Baba in someone else's body" if there was no thought or mention of Shiva at that time. It's bullsh**.
She also says that he was in the hospital in Karachi for 10 to 12 years but that does not add up either.
Dadi Janki wrote:In Karachi days, Baba used to come in someone’s body at that time. Some had this deep and natural faith that it is the Supreme Soul, God, who is speaking through this one. It is not that they had to create this faith. Because of their attainments they were able to develop that faith and bhavna. But there were others whose intellects used to work a lot.
Even if Baba himself spoke, they would not have faith in that. In order to instill this faith and experience the difference between this soul and that soul, Baba invoked Shiv Baba in someone else’s body and Baba himself became an observer at that time. So through that one Baba made everyone experience who is the One who comes in this one. And that scene was so wonderful – he was not just thinking about whether Shiv Baba comes in me or not. His intoxication was in becoming Narayan again. We could feel that he is the first soul to come in Satyug and become Krishna. We would feel that practically at that time.
When Dadi was in Karachi, in Kunj Bhavan, she started remembering many things. They used to call Shiv Baba “Piyu” in those days, the Beloved. So when Piyu used to come, we used to cook very, very good items -- special items.