I see praying as inofensive. You can tell her if you want,feel comfortable and she is open to such things. Keeping it for yourself is also great.
If you are performing a spell on her,she has to know and agree.
The way you cast it and what you use,these are the things you keep for yourself,but can also be shared.
The golden rule here,is that you should speak about these before or after the energy is released. Doing it during,can make it ineffective. I don't know if it is perfectly true,but better safe than sorry!

"The strength of the pack is the wolf, and the strength of the wolf is the pack" - Rudyard Kippling ⛤
Gender: Female