Love in Therapy: Using Transference and Countertransference Benevolently by Judith A. Schaeffer, Ph.D.
Countertransference in Therapy
Lust, Love and Countertransference: The Ethics of Sexual Integrity in Therapy
A TRI is an implicit acknowledgment of the powerful impact that people not actually in the therapy room, and events connected with them can have on what arises in therapy.
It is not an all-or-nothing phenomenon that cannot be brought under control.