This may not be right for me to say, for I do not know either one of you, but she sounds like she can be "your problem", and being bipolar doesn't help, especially if one isn't on meds that they may need.

It may be good if she did talk with the therapist, perhaps she can be educated about this disorder, sounds like she is ignorant when it comes to understanding disorders.
It is hard to control one's temper if they are approaching or already having a manic episode, and that also applies with many non bipolar people.
What doesn't help in a relationship like this,is someone antagonizing the person with the disorder, just triggers more conflict.
I think if she isn't willing to understand and work with you instead of contradicting what the professionals know and advise you to do, it may be in your best interest,as well as hers, to end the relationship.
It's not uncommon that the person that doesn't believe mental disorders exist, are the same person that has issues, and even a disorder(s),but are in denial.
It's sad when one with the DX, works really hard following a program, and is improving but the partner just seems to go onto provoking stuff.
I'm not saying that is in your situation, for I do not know either one of you.
My brother's first wife was ignorant to the disorder,provoked him,said that pdocs and meds weren't necessary,blah!blah! I'm surprised she was able to recieve her Master's degree in elementary education.
It wasn't just his disorder she was ignorant about, but other things in life. Long story short, after her going to some sessions with my brother, his pdoc determined it was really his wife that had more of a problem than my brother.
Well, needless to say, she couldn't accept that (denial) and of course she wasn't going to get professional help, for she felt she had nothing wrong with her, that all the problem was due to my brother.
She was so ignorant she didn't think he had a DX but needed anger managment.
Well, how would any spouse feel if they came home and found their wife/husband in their bed with someone?
One of the things I'm trying to point out, failing/weak relationships are not always due to only one's DX, but the non DXed partner may very well have a disorder,and should be professionally evaluated.
Hope my long 2 cents was of any help.
Take care now,
DE