In Zambia, religious nationalists exploit legal and policy ambiguities to construct abortion and LGBTI+ rights as un-Zambian and un-Christian. This delegitimization narrows the scope of sexual and reproductive health and rights (SRHR) to family planning. Drawing on forty-five in-depth interviews with Zambian stakeholders and international aid officials, we argue that while these ambiguities constrain reproductive justice, they also allow activists to advance SRHR by building coalitions that connect advocacy for abortion rights, LGBTI+ rights, and reproductive justice to promote health service access and bodily autonomy for all. In Zambia and elsewhere, such activism and coalition building merit greater attention and support.