A long friendship ending

I need advice on how I should handle a situation with my BF. Ok so, me and this friend have been friends for 16 years. She is on the verge of going thru a divorce and her husband asked me to maybe talk to her and see if I could get thru to her. The problems he is having with her I've notice time and time again. When you try to talk to her she shuts down or says she doesn't care. Even when her parents try to talk to her it doesn't work. Here are her evident problems:

She doesn't work

She doesn't clean

She doesn't cook

She makes her kids eat hotdog and ravioli cups or oodles and noodles everyday with no real meals

She lies

She cheats

She isn't intimate enough with her husband

She's extremely lazy and manipulating

Now her husband drives trucks, he's away during the week and comes home on the weekend. He pays all the bills, but can not get what he needs out of her.

I tried talking to her and she just pissed me off by saying she doesn't see anything wrong with her life. Side note: she is homeless right now and living from house to house with 3 children under 12. Her husband is going to take her kids and I want her to see that it's for the best because she really needs help. She does not agree. I'm afraid this is going to cause me as a friend to back away from her as well because we are on two different levels. I don't know what to do. Any advice.