My husband read the first half of SSM last summer (about 7 months ago), put the book in a drawer, and never said a word about it. During our recent "big discussion," he said that the book helped him understand quite a bit. However, he took no action at the time. Or, maybe he meant to but kept talking himself out of it. But that's my sitch, not yours.
I hope it impacts her and helps her to start looking inward and working with you sooner rather than later!