Anti-immigrant rhetoric undermines Latinx parents' epistemic legitimacy as producers of valued parental knowledge, irrespective of immigrant status. Little is known about the epistemic harm to Latina mothers who must negotiate their maternal scripts against the backdrop of a parenting discourse steeped in deficit thinking. This study used testimonio to explore the experiences of Latina mothers of young children living in the borderlands of South Texas via a Chicana/Latina feminist epistemological framework that conceptualizes the self as multiplicitous and responsive to the straddling of multiple cultures, nationalities, races, languages, and physical borders. The research questions guiding the study included: (1) How do Latina borderland mothers experience epistemic harm in the context of mothering knowledge? and (2) What strategies do borderland mothers employ to nurture strength and counter epistemic harm? Two theoretical constructs emerged from data analyses. First, the borderland was a site of recurring credibility battles as well as a site of "in-the-flesh" encounters that deepened human connection. Supporting themes included "Brown-on-Brown conflict vs. like-me counters" and "situating injustice vs. denying injustice." The second theoretical construct asserted that borderland mothers' ways of knowing are polyvocal and reflect a Brown body ethic of care. Its two supporting themes included "co-family as sources …