This article explores interpersonal meaning in social media photographs, using the representation of motherhood in Instagram images as a case study. It investigates the visual choices that are made in these images to construe relationships between the represented participants, the photographer, and the ambient social media viewer. The author draws upon existing work on the visual systems of point of view and focalization to explore interpersonal meaning in these images, and proposes that an additional system – subjectification – is needed to account for the kinds of relationship between the viewer and the photographer that are instantiated in social photographs, as well as the ways in which subjectivity is signaled in these images. The dataset analyzed is the entire Instagram feed of a single user who posts images of her experience of motherhood and a collection of 500 images using the hashtag #motherhood.