Originally Posted by nicraq
...I'll let her know about the site and possibility of support. I don't think she would join here but you never know.
There are specialty lists:
PolyMono · Polyamorous/Monogamous Support
"This is a support group for monogamous people in a committed relationship with someone who is polyamorous."
livingpolymono · Polyamorists with Monogamous Partners
"This list supports all people concerned with the challenges of poly/mono relating. However, it exists primarily to provide support to polyamorous people with monogamous partners."
I suggest you invite her to join PolyMono, while you don't join it. That gives her space to talk to others without you listening in.
Both lists have message archives and resource files.