This is how it sounds to me, if things aren't right let me know.
But it sounds like he got you into pretty much a state of subspace where you'd agree to things and then used that to make you have this agreement that it doesn't sound like you want.
That is not a healthy relationship. My recommendation would be meet with him somewhere where you know you wouldn't be getting back in bed, like a coffee house, and explain to him that you agreed only because of where he put you and that is not a relationship dynamic you agree to. Remind him that you were already poly when he started seeing you and if it's not something he's okay with anymore that's fine and you two can work towards a mutual break up but that he does not have the right to use a subspace like state to try and change a dynamic.
Woodsmith: My husband
Merry: Tig's wife/slave
N8: Merry's boyfriend/owner
Elle: N8 girlfriend
Ruby: Part of the Leather Family
Logan: Leather Sir in the Family
Arc: Logan's boy
Holly: Leather family
K: Holly's sub