Wait, so tell me if this is a plausible guess here (I am not saying this is true, this is mostly rhetorical):
INTJMom used her tertiary Fi in order to discern between fake and genuine behavior. Through her Fi, she experienced a "gut feeling" and concluded that I was being fake. Then using auxiliary extroverted thinking, she materialized her affect and challenged my sincerity, making the decision to leave this thread?
She used her primary Ni and then made her conclusion using secondary Te. Then based off of her conclusion, decided that she did not like me through tertiary Fi, and left the thread?
DM, do either or both of these make sense?