Well this is a postpartum pill so plenty of exercise may be out. Depending on how labor and birth went the mother may not be in any condition to exercise. Also I think most mothers already get more time with loved ones postpartum than other times.

Postpartum is typically a time of little sleep, rapidly changing hormones, and lots of lifestyle changes too. So postpartum depression is very common, and not something that is so trivial to solve.