He surprises me with anal sex as I reveal his large cock to him

I was walking back from the library when my boyfriend suddenly pulled out his huge cock. I was taken aback at first, but then I realized that he was trying to surprise me. I was excited to see it and couldn't wait to give him a blowjob. But before I could even get started, he pushed my ass and started fucking me. It was my first time getting fucked in the ass and it was amazing. I moaned loudly as he continued to pound my ass. He was so big and I loved every second of it. I had never felt so much pleasure before. I begged him to keep going and he did. He fucked me hard and fast, making me scream with pleasure. Finally, he came inside me and it was the best feeling ever. I had never experienced anything like it before. It was a great surprise and I hope he can surprise me like that again.