The chapter aims to contribute to a rethinking of queer kinship on new-materialist grounds, while critically-affirmatively transgressing the discourse-theoretical and voluntaristic concept, families of choice. Drawing on the author’s poetic-philosophic research on death, dying, mourning and afterlife in queerfeminist and new-materialist perspectives, the chapter discusses the agency of corpoaffective bonds in the context of rainbow kinship relations. In accordance with the method of autophenomenography and the author’s further development of it within the framework of a posthuman phenomenology of mourning, and her use of poetic writing as a method of inquiry, the analytical material is autobiographical, poetic texts. The texts explore intense corpoaffective moments, related to the author’s lesbian life partner’s cancerdeath. Based on an immanence philosophical analysis of death as becoming-imperceptible, the author suggests that her partner’s death made her and her rainbow kin co-experience an affective void, to which they responded through collectively shared mourning practices. It is discussed how the collective mourning for the author meant that her relations to her rainbow kin intensified, calling forward a corpoaffective move from her earlier identification as lesbian co-mother to a desire to subjectively fill the void mother space. Furthermore, the chapter puts focus on the agency of temporalities in the formation of intergenerational rainbow kinship.