The aim of the study is to explore whether bereaved parents' capacity to mentalize is related to their progression through grieving and how it changes during couple therapy. The clients' RF levels were assessed using the Reflective Functioning Scale and Psychotherapy Reflective Functioning Scale Manual. The content of the sessions was analyzed using Thematic Analysis. At the beginning of the therapy, concrete images of the child's death were more frequent and the parents' RF was lower than their general RF level. As the therapy progressed these images were gradually supplanted by more mental references to the deceased child.