Her sponsor helped her admit deep resentment towards her adoptive mother. 

Rigorous is “an adjective that means extremely thorough, exhaustive, or accurate.” Rigorous honesty is a commitment to complete truthfulness in all aspects of life, even when it's difficult or has consequences. Phew. To become rigorously honest is a process that develops through the recovery process. This addict had no clue how to be honest at the start of her journey, and to be rigorously honest seemed impossible.