My friend is the only person that knows about my atheism. I'm a closeted ex muslim and my family can't ever know about that.

When I first told her she texted my mum to pray for me as I think too much and need prayers, they both never told me, I knew on my own.

She thinks I'm sick and wants me to go to a psychiatrist, I refused saying I'm fine and will know when I need to go. She then texted mum asking if I was behaving differently, I found out on my own, she took a snapshot of their conversation "the non related part" and sent it to me but this is unrelated.

I found that mum never mentioned she talked to her and when I went home I checked mum's phone. " I know it's not okay but friend has depression and I feared she might have told mum unreal things about my mental health" I'm okay btw but she heard from another friend that I had problems concentrating for an exam and she took it way too far.

So, yesterday she asked me to delete her sister's number from the contacts that can see my status because she started asking my friend about what I mean with them, I said no and told her to simply shut her sister off by telling her she didn't know. She said she has no energy for that and can't deal with it now, maybe after she finishes her medication she'll be able to deal with her family knowing about me.

I said this is personal and I don't want to delete her sister, if she asks her something she can just ask me because it's my problem. She said not when it's in my house, and she doesn't want her family to know. 

Today, for the first time mum asked me to translate my status - that are im English - , I asked why all of a sudden she said she wants to understand them.

 I asked my friend if she said anything about the status, she said that whether she told mum or not where's the problem, and that since I'm putting these status mum can ask to know what they meant, then said she didn't tell her cuz she's not crazy nor afraid to tell me if she did.

I blocked her. 

Tl;dr, friend might have told a big secret of mine to my mother and I didn't believe her that she didn't. 