TJ, what you are going through is one of my worst fears.
I think about you so much, and pray that you will make it through this ok, and that your husband can have some good quality time, the more the better.
My Stepdad has told me that he SO misses the sound of my Mom's voice, he wishes that he had even a scrap of a recording of her, but he doesn't. But YOU still have time! Ask your hubby if you can record the two of you talking (and you'd better have a list of things that you can talk about or you'll both end up tongue tied at the thought of trying to think of something to say!) It doesn't matter what you talk about, maybe reminisce about the past? A videotape would be wonderful, both picture and sound.
When my Mom died, she had been very sick and was hospitalized for weeks on end, but she was getting better and we thought she would be coming home, when she suddenly went into a coma and was brain dead.
One thing that kept me going after was the fact that I was there with her almost every day, all day (if I wasn't there, someone else was) and I treated her with the love and respect that she inspired in me. I treasure the little moments of that time with her, from massaging her feet to helping her get to the bathroom with that IV cart, and am so glad that I told her every day that I loved her.
I'm so sorry about the loss of your son, I didn't realize that. Obviously you are far too well aquainted with loss.
I do wish that we could help you more. Just know that there are many many of us out here hurting for you and with you and praying for both you and your husband, and hoping for the best. {{Hugs}}