Why did she block me?

Added a girl on Facebook 3 days ago.
Shes 15. We agreed we wanted to meet up 2 weekends later.

Friday, we had a decent conversation. Yesterday it was decent as well and some bits got sexual.

Today, it was again decent. I asked for a tit pic and she wanted to show me on Facebook but Facebook deactivated her account last time that happened. She then said she could text it ...I told her it's alright nevermind.
After a topic of conversation, I asked her for her kik/snapchat if she wanted to send the pic

While the app was downloading, she was asking me questions like am I horny and she said that she masturbated to a female model(she's Bi)....

Went to look for her username on the app, couldn't find it , came on Facebook again, then I realised I was blocked :/

Suspicions:
She only has 50 odd friends
Most of her friends are not in our city

I don't know why she blocked me....she was the one that was insisting on sending the pic ...
What did I do wrong?

Are you certain that she blocked you or did she just get permanently banned from Facebook?

I'm pretty sure she blocked you because she certainly didn't want to send pictures.

Wanting a 15 year old girl to send a picture of her boobs to you when she doesn't even know you? Come on.

So? I asked and she wanted to send...I didn't force her...
Anyways she isn't who she says she is..

Also she's on tsr....

Please can everyone stop pretending the girl is totally innocent. Based on the story she seemed keen to oblige to giving nude pictures (she asked if she could text them) and had an interest in sexual flirtation apparently. It's a two way street Jesus.

The bold part being the key word. I'm not sure if I believe that many 15 year old girls would randomly sent such demeaning photos to a complete stranger after a few days. I mean some would, yes, but on the whole I think the majority would scream creep; thus there's the question, did the OP try and force/push her to send a picture, which of course wouldn't be admitted. I know we don't have all the details and what details we do have are up for debate; indeed the whole issue is hypothetical being a possible catfish even. Forgive me for being cynical.