Interesting. Hard to say without knowing you all. But my guess would be that she's given you the article precisely because she wants to say: "I'm willing to talk about this but only if you want to, and on your terms."
Because she hasn't just opened a conversation, it's more of a hint, which you can ignore or pursue.
The article is very clear about the issue of power and about men supporting their wives, too. And it flags up the vulnerability of the mil. So it does sound as though she is "telling" you the ball is in your court.
Have you had problems with your dh? If so, I wonder if she's hinting that she might be willing to think it's not all down to you, ie. that he has clay feet.
I think she sounds as though she may have difficulties articulating stuff but is willing, indeed wants, to move to an affable relationship.
Of course, how she has read that article and how I might read that article are too different things.
But my mil is always a bit uncomfortable with emotional stuff. She doesn't really do it. And I can imagine her doing something like passing me an article to read. I'd take it as a token, if it were me, and, actually, if your mil is anything like mine, I wouldn't necessarily sit down and expect a very hippy-ish, emotional chat, but perhaps some rather awkward, but well-intended, stilted sentences whilst doing the washing-up, or something.