We demonstrate the value of a rapprochement between psychoanalytic work aimed at supporting marginalized mothers and discursive accounts of low-income mothers, providing a psychosocial analysis of data from an interview study with six low-income South African mothers. Employing discourse analysis, we show how instrumental mothering is a dominant and precarious construction in these mothers’ talk. We use the concept of mentalization to track the affective work that accompanies the interactional emergence of this instrumental mothering discourse in a particular interview encounter. The implications of the research are discussed in the light of increasing demands for sociocultural responsive research and clinical practice.