Thank you. They can no more exclude you from the hospital then you can exclude them. It would be different if you had power of attorney with regard to health and welfare, then you could exclude them but as it is, you can’t. Nor can they.
With regard to the texts, particularly in the light of the previous incident, this is harassment it is a police matter. If you don’t want to go to the police because your mother doesn’t want you to, then I’m afraid you have no option but to put up with whatever your sister brother throws at you.
You could seek a civil injunction to prevent her or him texting you or speaking to you and if you got that injunction and they did approach or even text you, they are in breach of the order and liable to be arrested.
Based upon the texts wording and the previous conduct, you have enough background circumstance to apply to court for court order to keep them away from you.
Can I clarify anything for you?
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We can still exchange emails. Best wishes. FES.