AITA for unintentionally getting my friend in big trouble?

So I (M18) was coming home from work where I saw a really nice friend of mine (F17) and we decided to go home together on the bus. We have a really close friendship where we’ve never fought once, she sometimes hits me as a joke but it never hurt, that’s the type of friendship we have. So we were hanging near a community mall that’s like really close to our houses, where we met with another one of our common friend’s. She gave us her bag to try out our friends bike when her dad called. She quickly ran and answered the phone and told us to be quiet. But we all had so much fun and we were laughing so hard that my dumbass decided to play what I thought would be a harmless prank, where I just coughed obnoxiously loud, no talkng, just really loud coughing which obviously sounded fake. She turned around 3 times to shush me but my dumbass decides to cough even louder. When she’s done she begins to walk towards me angrily and and I thought she was joking but then she hits me a few times, screaming and crying, cussing at me, which made me realize she was serious. She caused a whole scene, screaming, and shouting and swearing at me, I apologized profusely. My stupid ass got confused, but then she told me how angry a father would be if he finds out her daughter was hanging out with 2 boys at 8:30pm, and it hit me, how could I have not thought of that? I have strict parents too and she told me that I, of all people, should have know, but we were just having so much fun, and honestly I didn’t even know she had strict parents. We began walking home and I continuously apologizing to her, telling her how it was all my fault, but I never had the intention of getting her into trouble, I just thought it would be a harmless prank, but she continues to get angry at me, and she did warn me to be quiet and I ignored her. Her brother saw us during her breakdown and she told him to go away. I walk her home, and she’s calmed down a bit, and I let her ger revenge by letting talk loud and say random shit when my parents called, and she said we were even, and I asked if we were friends, she said yes, but when i come back, home, i get text messages from her, where her brother snitched to her dad, how she was screaming and swearing in public. She proceeds to tell me how her father told her to never talk to me again, and she then tells me she herself never wants to talk to me again. I don’t know if our friendship really has ended, she hasn’t blocked me on anything yet, but maybe her phone got taken away. It was extremely stupid of me, but I made no excuse and apologised profusely, asking her to forgive me, how I was careless and foolish, how it was my fault. I’m thinking of buying her an apology gift with my own first salary (I got my first job) and I’ll ask one of her female friends to give it to her but am I still the asshole for trying to do what I thought would be a harmless prank?