Im tired of my sister getting involved in things she does not have to, What should I do?

I have a married sister and I dont get involve in her life but for some reason she believes she is intitled to get involved in mine. I have a FB account and I m a member of a group there. The blog is called "A bit of everything" where members can post about anything from asking for help for their personal problems to aks for ideas to find lets say ideas of house decorations. The group is about everything. My sister is also part of that group since she is part of that group she can see when I post something and I can see when she post something. There is a option where you can post anonymously and most of the time I post what I post that way cause my sister is like onto to me checking what I post or not post so she later can question me or criticize mein private over text for the things I post and question why I post X thing since she could read what I post when I dont post anonymously beacuse in taht group the real name of the members are shown each time a person post something unless is anodymously but still sometimes even anonimously with hints a person who is the group may know who that person is talking about.

Anyway I have my sister as part of my Facebook contact list and I blocked her from my account cause everything I post she has to like follow me and see what I post so if I post something incorrect then she has to question me what I post this or that. So I was never comfortabel of her reading everything I post cause she was part of my contact list. So I blocked her many months ago she was not aware I blocked her but then months after I blocked her she found out that she can no longer see my profile (it was cause I blocked her obviously) and asked me if it was because I blocked her. I play along and told her that I was having some issues with my FB account I di dnto tell her the reason why I blocked her. S0

Updates
7 mo
she told me "add me again" I did nto add her anyway but weeks later she again ask me if I add her alrady cause she still could not see me so at the end I had too add her again.

The reason I blocked her was precisely because I did nto like her to follow my every move on FB and then question or not what I post on different blogs, exactly what It just happen minutes ago. She questioned me about something I posted on this group she keeps doing it and that was the reason in the first place why
Updates
7 mo
I blocked her to leave me alone and stop complaining about evertyhing I post but she did not like me to blockher months ago and and asked me twice to add her again.

Im tired of my sister getting involved in things she does not have to, What should I do?
Post Opinion