@mamag, You, your son, your sister have been blessed in a most wonderful way! I want you put a big circle on your calendar to highlight that special day next year and every year.
Has your son had a conversation with his doctor about the prednisone question? I hope that the doctor was able to ease his concerns.

I want to share this link with you - "Self-Care Tips for Transplant Patients". I think you and your son will enjoy reading about how to stay healthy after his transplant. For me it was a big and frightening step when I was strong enough to resume my normal activities. I strive to follow these same self-care practices every day.
https://connect.mayoclinic.org/page/transplant/newsfeed-post/self-care-tips-for-transplant-patients/
Which Tips do you think are especially helpful to you as a mom/caregiver?