Purpose Breast cancer survivors’ (BCSs’) sexual health (SH) clinical conversations are rarely studied from a dyadic perspective let alone from a triadic perspective. Using a triadic approach, we evaluated BCSs’ comfort discussing SH with partners present and identified factors that can contribute to their comfort level. Design Qualitative approach using in-depth interviews. Participants 93 BCSs, partners, and providers involved in BCS care. Methods In-depth interviews with BCSs, partners, and providers explored triadic perspectives to understand factors informing BCSs’ comfort level. Thematic analysis was used to analyze data. Findings Four themes characterize potential benefits of partner presence: 1) partner facilitates information exchange, 2) partner realizes BCS’s SH concerns are “a real thing,” 3) partner better understands SH challenges, and 4) partner presence encourages relational communication about SH. Five themes illustrate potential complications of partner presence: 1) partner feels/becomes embarrassed, 2) partner is/becomes defensive, 3) partner presence constrains BCS’s agency in clinical conversations, 4) partner presence threatens partner’s view of BCS as a sexual being, and 5) partner presence increases partner burden. Implications for Psychosocial Oncology Providers should (1) initiate conversations about BCS comfort with partner presence, (2) be aware of the interaction between BCS primary and secondary goals, (3) consider how BCS/partner goal conflicts obstruct BCS agency and sexual/relational health, and (4) offer opportunities to clarify goals and expectations, and coordinate therapeutic options.