AITA for accidentally catching my brother’s girlfriend in a lie?

This might be a bit long so I'll put a tl;dr at the end!

I (19f) have a brother (24m) that I'll call Liam. Earlier this year, he started dating a girl he met at his climbing class that I'll call Emma (26f). They've been together for 4 months and this weekend he decided to introduce her to us.

They arrived yesterday and are staying until tonight. She is a really nice person and we got along well. Then at one point my dad asked her what she did in life and she said she was a lawyer. I was super interested because I'm currently studying law and have wanted to be a lawyer since I was maybe 10, so I was very excited to ask her questions about it. I asked about cases that she had, how she studied to become a lawyer, what her days looked like and many more things. I might've been a little over enthusiastic and annoying but I didn't realize it at the time and was just excited to get to ask someone questions about my dream job.

But at one point she said something that seemed incoherent to me. The details might be long and boring but basically she just said something that isn't technically possible. So I was curious and a bit confused and I asked her how that was possible because I just thought she's the professional so she must know better than me. But as she tried to explain it she just said more incoherent and impossible things. It was kind of like if someone was quoting things from Grey's Anatomy to doctors if you see what I mean. So I asked more about it to understand and that's when she admitted that she wasn't actually a lawyer and worked at a bookstore.

She told us that she was very sorry for lying and then left the table and my brother followed her. My parents kind of scolded me for being so intrusive and when my brother came back he was a bit angry. He started telling me that I was wrong for "interrogating her" and that I made her uncomfortable, and that she had lied because she was embarrassed about her job and I just made her more embarrassed. Now he hasn't been talking to me since and neither has Emma.

I'm not sure I'm in the wrong here but they all seem to think so. I get that me asking questions was annoying and maybe a bit too much but I truly didn't have bad intentions I was just excited to be able to talk about it with someone. And also I don't understand how everyone is so okay with the fact that she lied to my brother for 4 months and then also lied to us. I get being embarrassed but I don't know it's still a bit weird to me. But I never meant to make her uncomfortable and I genuinely liked her. I don't see how I'm in the wrong but maybe I just can't see it so please tell me so that I can have another perspective.

Tl;dr: We met my brother's girlfriend and she told us she was a lawyer so I asked her questions because I was interested. But she said some incoherent things and then admitted she was lying about her job. They blame me for asking too many questions.

Edit: For everyone wondering if I'm on the spectrum or neurodivergent in any way, I haven't been diagnosed with anything but many doctors and teachers of mine have mentioned it to me. I can understand why but I don't want to self diagnose obviously. I haven't been able to get tested because my parents "don't believe in that stuff" but as soon as I'm fully independent (financially, and living on my own) I will get tested.