I'm also confused with no names. I'll go with whatever you pick but for sake of this post...
- There is you, Forensick.
- Then you have this partner, Thermometer.
- And they want to date your ex, X-Ray.
Your continuing consent belongs to YOU. So does your "staying-ness."
Just because you agreed to date Thermometer before? Share group sex with Thermometer and X-ray before? You don't have to keep going with more stuff with them "automatically."
I think these consent cartoons illustrate some cases very clearly.
Life would be awful if people actually did these things – so why do people do it when it comes to rape?
everydayfeminism.com
It is your responsibility to look out for your own well being. You have to be able to say "Nope. I like/love you a whole lot, but not even for you will I do stuff I don't like/hurts me."
It's your responsibility to give clear communication. Thermometer is not a mind reader.
If Thermometer wants to date X-ray now? And things have changed and now you want to be done with X-ray?
You can say "Thank you for telling me. If you want to date my ex X-ray, I won't stop you. I do have to bow out of this poly network though. I have a personal boundary of not dealing in my exes any more, even as my metas."
Thermometer is free to choose whatever they want to do or not. Including being free TO pursue X-ray.
Just as you are free to choose what you want. Including being free FROM poly networks that have X-ray in them.
If you both have not articulated who the "messy people" for each of you is? And you plan to continue together? Maybe make time to have that conversation. There's enough people in the world to date without going right for the messy ones. (Ex: siblings, parents, bosses, roomies, exes, etc)
Galagirl