fidelity
polyfidelity
https://lgbta.fandom.com/wiki/Polyfidelity
A polyamorous group of persons committed to one another, not having sexual and/or romantic ties to others outside of the group.
polyexclusivity
polyfidelitous
alt.polyamory Frequently Asked Questions (FAQ) - Section - 4). Primaries, secondaries, vees and triads: polyjargon and polygeometry
BDSM And Kink Terminology: A To Z
Dr. Harmony's Glossary of Kinky Terms