How mother do I talk to my hypomanic mother

My mother is definitely misdiagnosed as just depressive.  I am positive she is Bipolar II.....When she gets shock treatments to get her out of severe depression, she is fine for a while and then she is on an anti-dep. for a while then she stops and I notice a change.  She gets up really early, shifts things around, very busy but house is continuously messy, is calling old friends out of the blue, spends way too much money, drinks, paints things incessantly, irritable, cocky, all the while thinking this is completely normal........My question is, how do I get her to listen that she is experiencing hypomania?  My Dad does not even want to bring up the subject for fear of a lashing out.....How does she not recognize she is acting entirely different?  She is very good at fooling people in that she looks alright from the outside....but when I visit I notice something is wrong......Please help.  It is very difficult to see my Dad come home after work and get the business from her........And we are afraid she is going to plunge into depression again......

Thanks!