Three years dating a poly-identified woman. Agreed to monogamy after one early disclosure. She secretly returned to poly, declined structured repair, and gave up our primary partnership to become the new secondary in the AP's existing polycule. He kept his marriage. Day 10, looking for community wis
I am 50, monogamous by orientation, ten days into no contact after a three year long distance relationship with a poly-identified woman I'll call Jen. We lived about 500 miles apart in different states. The arrangement we had was monogamy by mutual agreement, but she identified as polyamorous underneath the agreement. I am posting because that configuration is one this sub knows well.
Quick arc.
Year one, I had been operating under a monogamous frame. Six months in Jen came home from a festival and disclosed an outside connection to me in bed, after the fact. I did not leave.
December 2023. After extended conversation we agreed to be monogamous. Mutual agreement, explicit, both sides on record.
2024 through late 2025. Monogamous, by mutual agreement. I had what I thought was a primary monogamous partnership.
Late 2025 onward. Jen secretly broke the agreement. A musician local to her city, who I'll call Mike, became a five month sustained concurrent connection at weekly cadence, emotional and sexual and undisclosed, which continues today. Mike is married to Lily, in a poly arrangement; Lily negotiated explicit terms about how Jen entered Mike's polycule, including no overnights with Jen. Jen honored those rules toward Lily. Mike also had a previous girlfriend (Maggie, who leans monogamous herself). From a text Jen accidentally sent me the day after our ending, intended for Mike, it became clear that Mike had ended his relationship with Maggie as the affair with Jen intensified. Mike kept his marriage. He just swapped which woman occupied his secondary girlfriend slot.
A man I'll call Pete entered the configuration alongside. Others.
March 2026. I wrote a relational guardrails document to protect the primacy of our relationship, knowing the additional pressures her local sex and dating would do to our LDR, not knowing she had already been cheating for months. The document was too late.
The pattern through the discovery phase: trickle truth, names withheld until I pressed, retroactive philosophy as the warrant. The poly identity she had not invoked for two years suddenly returned as the cover story.
In April I made a structured ask. Stop seeing Mike for 90 days. Repair our relationship. Both of us in individual therapy. Negotiate written guardrails before any resumption of nonmonogamy. I was not requiring permanent monogamy. I was requiring repair and rebuild before resumption.
She declined the entire ask. She preserved her new relationship with Mike, and what she wanted with me instead of either repair or a clean ending was to demote me into a lower-intensity ongoing role — keep me available at lesser intensity while she pursued Mike and the others. I declined to be demoted into a safety net. That declining is what forced the actual ending. The actual ending was a May 7 video call where I asked her directly when she next planned to see Pete. She gave me two specific date windows in May and June, on her calendar. She had been rotating for months and entertaining new connections while telling me she loved me and concealing her infidelity.
My read now is that the affair was not NRE-driven. NRE responds to pause-and-repair. She declined because the affair was functioning as an exit. The asymmetry is the part I am still sitting with. She gave up our three year primary partnership under a monogamy agreement, to enter Mike's existing polycule as the new secondary, with Mike keeping his marriage intact. Maggie, the woman she displaced from Mike's life, leans monogamous herself.
Full no contact since May 10.
What I am asking this sub specifically:
For mono partners who dated a poly-identified person who had agreed to monogamy, what should I have been watching for? Is the resurfacing of a previously-set-aside poly identity a known failure mode of these arrangements?
For mono partners who exited this exact configuration — where your partner gave up the primary partnership with you to become a secondary in someone else's existing polycule, while your structured repair offer was declined and the alternative offered was to be demoted into a downgraded ongoing role — what did the first six months of grief and reconstruction look like? Does this asymmetry change the integration timeline?
Anything you would tell me at Day 10 that I am unlikely to hear from people outside this experience.
Thank you.