A lady at work has a new granddaughter and she was born with a tumour on her bowel which they had diagnosed a few weeks before the birth, the surgeons operated within 48 hours and removed the growth and she is perfectly fine now health wise, it was an extremely worrying time for the whole family but the gran was stunned at just how much the medical and surgical team were aware of before the baby was even born, and they were very reassuring and confident in a positive outcome not only for the operation, but that the growth was benign, they have made some tremendous advances in anti-natal care and this really showed.
I suggest you steal yourself to feign a few days sickie and get down there to be with your sis when the babies are born, your job will still be there but maybe you all need to be together as a family now. ( never tell my staff I suggested that lol)