For context, my girlfriend and I are both teenagers. I'm not going to go into detail about most of that information, since I'd like to keep this mostly private. I am AFAB, and I've always been very paranoid about men, specifically adult men, seeing/perceiving me sexually.

Recently, I started dating a girl. Let's call her E. She and I have been friends for a while, and we collaborate often on creative writing projects. I enjoy her company, but she's never been great with boundaries due to her autism. I try to be as loving and supportive as I can towards her. She knows about my issues and I believe she's been accommodating as she can up until this point.

We got into a relationship a little less than a week ago, and she's come on very strong, though I don't necessarily mind that. Long story short; sexting has occurred and nude photos have been sent between the both of us, though she initiated both things. Now, here's where shit gets absolutely mind-boggling to me.

Today, I sent her a revealing photo of me, and everything seemed to be okay for a while. Our conversations went on as normal. Then, she called me to tell me that her dad had seen the photos. While I was processing the information, she began to rant about how the day had been very difficult for her, and how she was very overwhelmed. I could not believe it.

He immediately interjected and began to lecture me about their family situation and how it wasn't okay. Her mother is very controlling, and because of her special needs, there is a court situation going on to decide who she'll live with and what the situation will be. He basically acted like I was completely interfering, and was saying that it's not appropriate for her to be talking to people like this and sending them photos. He mentioned that the photos she was sent/saved to her phone would get transferred to HIS phone. I ended up hanging up a little bit after this because I was hyperventilating at this point, completely about to break down.

I texted her and told her that I would need some time because this felt like a betrayal to me, and I explained why. She said it was understandable and that she deleted all of the photos from our messages and her phone, which I immediately did as well. We ended up agreeing that we would call in two days to talk about this, and this is when she said "I'm sorry that we both made bad choices."

Now, here's where I think I may be the asshole. I sort of blew up at her, asking how I made bad choices by trusting my partner when she initiated this. She said "I'm not trying to make a big deal about this and neither is my dad", to which I pointed out that as soon as I called her, he started berating me. I told her I would stop making a fuss, but that because of the way she was treating the situation now, I might not get over it as quickly as two days. She just said "the problem is over with and I am not wanting to talk about it anymore. We will move on from here." I did not reply to that because I was just so fucking distraught.

A full grown man now has access to those pictures of me. I'm so fucking scared, I think I might actually be going insane right now. She treated it like it was just nothing, and I'm worried that she's right.

So am I the asshole for blowing up at her for what could've genuinely just been a mistake handled poorly?

Edit: I forgot to clarify, but yes, we are both under eighteen. She assured me that these pictures and our messages would only be kept between us, and I trusted her because she also isn't very ready to come out yet, and I figured that was enough of a safety net. Plus, before this, she was my best friend, and I was able to trust her with a lot of confidential stuff that made me believe she was a safe person.