Daddies I am sorry to hear you have had such a strained relationship, but glad to hear things are turning around! Bipolar disorder is so difficult to diagnose and treat, it has torn so many families apart...so that you can bridge that gap is amazing. I can understand the nervousness though...that is a lot to deal with emotionally at such a vulnerable time. I am sure being there for you means a lot to your mom.
I would think 39-41 would be ideal, with your due date being in the middle...unless you are sure you won`t go over. Otherwise she would be leaving on your due date...