Does she maybe want to take it & asking you about it, or are you just thinking about ideas to help her get back into working out?
I would never just suggest steroids to anyone who didn’t come to the conclusion on their own that they are interested in taking them. Way too many potential ramifications. Coming from someone who advocates female steroid use, and use in general.
I don’t know much about Fibro beyond how crippling it can be, so I have nothing useful to comment on potential interactions unfortunately.