A partner's other partner, without implying direct romantic or sexual involvement.
Back to the glossaryConsent & relationships
Metamour
A partner of one's partner with whom one is not necessarily romantically or sexually involved.
Consent & relationships
In brief
A partner's partner—not automatically one's friend or intimate.
Metamour names a relationship position within a consensually non-monogamous network, not a required type of closeness. Metamours may become friends, share practical information, remain politely separate or never meet. Each person controls their own contact and privacy.
A person with whom one has a directly defined relationship.
An informal preference for comfortable shared social contact among partners and metamours.
An arrangement in which relationships operate more separately with limited metamour contact.
No required closeness
Some networks value friendship and shared events; others prefer distance. Neither kitchen-table nor parallel practice is inherently more mature or ethical.
A partner should not force metamours into friendship, group intimacy or conflict mediation as a condition of maintaining their separate relationships.
Information and privacy
Relevant safer-sex or scheduling information can be shared without disclosing another person's private messages, trauma history or detailed intimacy. Agree what travels through the network and who communicates it.
Metamours may choose direct communication, communication through the shared partner or a mixture. No method replaces consent to share sensitive information.
Shared partner and responsibility
The shared partner has responsibility for keeping their own agreements and managing commitments. Blaming metamours for every scheduling or boundary conflict can hide that responsibility.
Metamours can support one another, but neither is automatically responsible for the other's emotions, care or relationship repair.
Safety and power
Existing couples may hold housing, financial or social power affecting a newer metamour. Transparency about hierarchy and vetoes supports informed choice.
Harassment, surveillance or coercion is not normal network complexity. Use ordinary safeguarding standards regardless of relationship structure.
Non-graphic examples
What the umbrella may include
- Metamours exchange only necessary scheduling information.
- Two metamours become friends without sexual involvement.
- A parallel arrangement limits direct contact.
- Health information is shared without intimate narrative detail.
- The shared partner owns a scheduling mistake rather than blaming a metamour.
Reviewed 30 August 2026
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This detailed field note uses the best available evidence without treating one community sample as universal. Evidence limits and UK context are stated where relevant.
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