Maybe you could impress upon your sister that her ,your,dad would make an effort if he was moved to a loving member of the family home.
My dad was in John Hopkins hospital in Baltimore Maryland.
We lived in a Florida at the time.
We flew home to see him. I didn't even recognize him because he was so gaunt.
He begged me to take him with me.
They'll beat me after you leave!

He's been dead for over 20 years and writing this leads me to again feel the regret that I didn't bring him home.
My husband said he was likely hallucinating due to his meds. But I noticed while he was talking about that one of the nurses came into his room.
We left a little later.
Next day Mom calls.
Dad was in surgery.
Turns out the nurse who overheard Dad came in after we left so to give him his sponge bath.
Then, rather than put the bedrails back in place so he'd be secure she left his bedrails down.
In the middle of the night he'd supposedly rolled over and off the bed.
He broke his hip on impact with the floor.
He laid there allllll night. Which tells you they never checked on him for 10 hours till next morning!
They had the nerve to bill his insurance for the surgery on his hip!
I called the insurance company,BC&BS, and told them what happened after we got their statement asking for the deductable. After they'd already paid the hospital.
It's insurance fraud!
They said they'd pursue a case. But we had to pay the full bill back to the insurance company first!
So many things to regret back then.Like not getting an attorney.
Don't live with that yourself.
Get your dad out of that place!
Ask your sister how she'll feel if her excuse for closing his option to go to her home is something she can live with if he dies in the hospital?
Because it sounds like they're trying to kill your dad!
No health expert puts a man in his condition on an exercise bike in hospital.
That lawyer I suggest you get can help you to get him out of there. And make them take better care of him in the interim.
Because you've got one hell of a malpractice suit ahead of you already due to what he's already suffered.
There's a way to insure you don't live with regret. Do something!
If I could go back in time, my dad would have left JH if I had to carry him on my back!
John Hopkins was back then listed as the #1 hospital in America. I don't know about now.
It was a misnomer! They were never #1 due to patient care.
They were ranked #1 because of their medical research!
They let the public think that rank was due to the former, patient care, because that false rep made them a fortune.
*Hugs
Maybe that water pouring in your dad's closet is a sign from Heaven.
Save your dad now! Or,you'll be living in a flood of tears later.