I'd also suggest NAMI their family programs can help you a lot with how to deal with symptoms. They are a free support group and if there isn't one where you live you can connect online. The reality is that if she is untreated and not accepting professional help there's not much you can do to alleviate the manic energy. Most people with BP don't seek help in the manic stage and are suspicious of any talk that something is wrong. However if she puts herself or your child in danger call 911. Then the hospital is a life saver. Do get education for yourself as she is the mother of your child and you will be dealing with her for life.