<human>: Can you provide a brief rundown of the text in within 3 sentences?

Backstory: my husband has gastric reflux, and underwent an endoscopy last month to check on the state of his esophagus and stomach.  During this procedure, his doctor found some odd lesions in his duodenum.  A biopsy revealed it to be follicular lymphoma.

So my husband has just found out he has cancer.  We elected not to tell everyone right away mainly because his mother has just had a total hip replacement and we wanted to let her heal in peace.  I told my sister and a few close friends, he told his bosses and his sister, who is a nurse.

Her reaction is, in my opinion, totally inappropriate.  She is angry that we told her, that she can't tell her mom.  She has initiated several conversations with my husband in which she basically tries to bully him into telling their mother.  It is *not* her decision to make, and we had hoped for a bit more sensitivity from someone who works in healthcare (I am a student nurse, and I am handling this way better than she is, for what it's worth).

I'm at the point where I don't want to tell her anything regarding her brother's health: if she doesn't like that we trusted her with this information, I feel like she should no longer be privy to any new information we receive.
<bot>: Husband has cancer, his older sister is being a bully and trying to get him to disclose info about his health that he is not ready to reveal.  What would you do?  Should we cut her out of the loop?