Bleeding can be because of two main causes.
1. Portal hypertension
leading to varies (swelling of veins in the food pipe). Once these get injured bleeding occurs, for this endoscopy
by gastroenterologist is needed to legate these vessels. This is common in liver Cirrhosis
2. Because of liver damage
coagulatin factors get diminished and patient bleeds. For this vit. K is needed.
Over al you have to visit a hepatologist to get the cause of liver failure
treated. Once liver failure is under control there will be no chances of bleeding.
If you can manage Hepatologists care at your place you can take your sister with you.