Is it normal i had sex with a random girl while on vacation at 15?

Ok so my family and I took a vacation to Mexico and we were going to cancun. At our resort, there was this really hot brunette girl who was a year older than me. I was 15, and she was 16. I saw her everyday and she had big round tits. She had nice tits, but her FUCKING BUTT. Her ass was literally the nicest thing I'd ever seen it was perfect. It was round and just massive. I got hard everyday I saw her. The hotel usually got really crowded and when music would come on everyone would dance. She bent over to get a drink from this guys cooler, and I purposely moved my penis right across her ass while she did and made it look like an accident. I did this every chance I could for three days straight. Eventually she caught on. She came up to me after i did it one day and said "hey what's your name?" I told her my name and she said hers. We talked for awhile and eventually she brought it up. She told me she knew I was checking her out and knew how I was rubbing my penis on her ass. She was really flirty with me and I was rock hard. Her parents and my parents were shit faced and we didn't know where they went. She thought I was super attractive and she offered to bring me up to her room. I asked what this was about and she said "if you think I'm so hot and love my ass, let's do something." We then started making out and she started blowing me. I squeezed her ass and took off her swimsuit. I asked if we could do anal sex and she said we could as long as I had lube or something. I told her I had some back in my room because I used it to jerk off. I brought it down from my room and met her. I lubed her huge ass up and slowly stuck my penis in her asshole. It felt AMAZING. I kept thrusting while she moaned and it took about 8-9 minutes for me to ejaculate. I didn't even pull out I just came in her ass. She seemed to not even care, and was satisfied. We both agreed we could do other things for the next few days and we did. This was the best experience of my life, and I am 100% telling everyone the truth. I'm just wondering if this is normal?