We would echo pretty much everyone on this thread. We plot our own course in our lifestyle journey. If someone outside of our core relationship is trying to control our path, then it’s a big red flag. If she’s developed a romantic attachment beyond the normal, that is going to be a problem, not only for you but for the two of them.
They need to step back from the lifestyle and examine their relationship and where they want to take it. If we were in your shoes, we would not play with them any longer. It feels harsh but the longer you stay in, the more damage is going to be done.

