Get her to come along to the post-natal support groups, its fantastic. Even if you have to come in with her, but ideally her partner if you can get him to take a leading role in helping her in this way. Lisa who facilitates the groups has worked for PANDA for 15 years (post and ante natal depression association), works privately as a counsellor and has written two books on PND. Its taken me 6 years to find the right counsellor, I see Lisa, and I now have hope I can get rid of depression for good. Getting out to the groups too is great, you can see you are not alone and get good help and support from others.