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]

The first part of the dialogue is the moment we 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 here we get a choice in how to approach the situation. 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 sure 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.

Though the reason why she doesn't look for deception is because the Narrator during these moments mentions that she is entirely focused and determined on locating the grove, but also because if we ask her how she knows we are a True Soul, she just accepts that we are as she feels the connection within us and does not question the Absolute.

The second part is the moment we betray Zevlor, in which the actual reasoning for the character joining her is stated out loud.

Originally Posted by Sozz
We also have a lovely narrator to help give our actions context and motivations. Nothing wrong with a little soul-searching for our character with the narrator serving as the Kreia on our shoulder.

Ah Kreia... such a phenomenally written character. Decades later and her lessons about morality, actions and consequences are so memorable. My favorite definitely being the lesson about the homeless guy just as you dock in Nar Shaddaa. A timeless classic KOTOR 2 is ^^