One of my friends suffers with pretty serious depression. She lost her son, who was aged 10 after a long battle with Leukemia a few years ago too, which obviously hasn't made things any easier for her. I have only known her for about 18 months and we became quite close/friendly after I lost my twin baby daughters.
I know (it's no secret where we live) that she tried to hang herself several years ago. She has a history of quite serious self harm and is in and out of hospital. She sees a pshyciatrist regularly when she is not in hospital. She talks to me, although not in a huge amount of detail about these things.
She is having a really hard time at the moment. She was in hospital for a few days a couple of weeks ago and we text a couple of times and when she was home I dropped a few magazines, some chocolates and nice ice cream round. He DH answered the door and I asked him to please let her know I was thinkin gof her and I knew the bits an dpieces weren't much, but just so she knows I care. She text me and appreciated the thought. She has since been in hospital again, but is home again now (I think). Her DH is having to take time off work and although their DS (who gets on the same school bus as my DS) has been off school a lot lately, my friend's DH dropped him yesterday and today. I didn't want to pry, but just told her DH that if they wanted me to run their DS to/from the school bus it was no problem for me. He replied 'thanks for the offer, but it gives me a reason to get dressed'.
IIt must be very hard for him too, not least as I suppose in all of it he gets forgotten as everyone worried so much about his wife.
I am just at a loss to know what I can do to help, if anything. I was going to just text my friend and say something along the lines of 'thinking of you, here if you want to chat' but it seems so inadequate. I don't think she feels capable of egtting dresse dor out the house when she feels like this, so although I'd like to invite her to go for lunch or something I don't want her to feel like I am underestimating how dreadful she must feel. 
Any thoughts?