Personally I felt our intentions regarding the decisions were expressed properly with Minthara due to this piece of dialogue:
![[Linked Image from i.imgur.com]](https://i.imgur.com/B4lpzp7.jpg)
The first part of the dialogue is the moment we just meet her and end up telepathically linked during which the Narrator mentions how determined and focused Minthara is on locating the grove while probing us, so I'd take that as a reason why she isn't looking for deception. Though also because we can outright ask her how she knows we're a True Souls and she just accept it because she does not question the Absolute.
The 1st and 3rd option are basically acting as deception choices in order to save the grove, while the 2nd one is us somewhat joining her cause. And I'm pretty she immediately gains the location of the grove by choosing the 2nd option, while the other two choices require an intelligence check to prevent her from discovering the location, after which she orders us to clear our mind because she is unable to penetrate it.
The second part is the moment we betray Zevlor, in which the actual reasoning of the character for joining her is stated out loud.