Wendy,
I went through a similar situation about 3 years ago. It was the hardest thing I had ever been through. My mother was diagnosed with a glioblastoma grade 4 brain tumor 8 weeks after I got pregnant with my first baby. My mom was my best friend. I have to say that going through it, it was the longest, hardest, worst year of my life. And yet, it was the best year because I was able to help take care of her, spend time with her and yes, she was able to meet my baby before she passed on.
I had a picture taken of the three of us (me, my mom, and my daughter) before she got really sick. I remember watching her favorite movies with her while holding her hand, listening to her favorite songs, and giving her her favorite "Jamba Juice". I just made sure that the last days she was able to enjoy what she loved. And I just wanted to be there with her. It is so hard, and after it is so so hard. Just enjoy him now. As much as you can. Time does heal. You don't think it will ever get any easier, but it does. I still think of her every single day. The tears are finally gone but I still have "Mom" days. My mother promised me she would be my daughters Gaurdian angel. Be so thankful that your dad will be able to meet your baby.
I am so sorry, I can talk about this now because it's been three years. I remember what it was like going through it and I don't wish it on anyone. Just be thankful that you have time to say goodbye. My heart goes out to you.
Sincerly Heidi.