The paper explores issues related to providing therapy to sexual offenders who are also victims of sexual abuse. The question of whether or not victims of sexual abuse are more likely to go on to abuse others is addressed, followed by an exploration of ways in which being a victim of sexual abuse can make the person more vulnerable to repeat victimisation and pro-offending sexual tendencies. The challenges faced by therapists working with this particular client group are outlined, focusing on client victim issues, the therapist's empathy over-spilling into collusion, and related avoidance of offence focused work. Qualitative data from probation officers working in a rehabilitative context with sexual offenders is cited, usefully informing the challenges faced by therapists. A fictionalised case study is presented, regarding a middle aged man who was sexually abused as a teenager and proceeded to sexually offend as an adult. Practice illustrations, taken from the case study, include strengths-focused techniques and questions which can assist in the therapeutic, rehabilitative task.