I had an awesome relationship with my W's grandma. I can't tell you what you should do on your situation but if I were you I'd go to the hospital. Some things transcend DBing. At a minimum look at it as being there for your son. He's losing a grandparent.
Don't make it about you and her. But about you and her grandma and your son.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018