That was so caring of you! Truly. I agree that the ball is in her court now. I also had a conversation with a colleague (he was suffering tremendously) and then left it up to him.
Unfortunately, he was at a tipping point and ended up leaving in quite a meltdown ... he is still not doing well (from what I understand), but at least I know I tried.
There is still so much stigma to mental health issues that I would feel honored if I had the opportunity to talk to someone IRL about how much I was suffering and not worry it would be held against me.