First Time Phone Sex

I'm 18 years old and I love to masturbate. I do it whenever I get a chance. I always get off while sexting it's definitely my favourite thing to do when masturbating. I had never had phone sex because it just never interested me and it made me incredibly nervous. I always thought It'd be easy to relax and enjoy myself. I honestly thought I'd never do it. That was until I started talking to Mark. He's 35 years old. We met online and had been talking for months. We had shared a lot of secrets that I had never told anyone. I honestly completely trust him. We've never met but I love talking to him. After a long time of talking and him understanding that I didn't wanna talk on the phone, he called me while he masturbate and I muted my phone so he couldn't here me and I tested him. I'm a virgin and it was the sexiest thing hearing him moan my name as he came. What I loved was cumming with him. It was so amazing. We did that a few times till one day I was in the car alone. I had to take my mom to a meeting and I waited in the car for her. I got incredibly horny and tested Mark. He told me he had some time and asked if he could call me. I said I didn't think I was ready for that yet. He said it was ok and that we could just talk if I wanted. Then I saw his name pop up on my phone and answered it but I choked for a second after I answered. There was a moment of silence and then I quietly said, "Hello". Then I heard his sexy voice start talking to me. I was smiling so much hearing him. We were just chatting about stuff when he asked if I wanted to be on the phone when I masturbate. I kind of laughed and said not this time. Then he told me that he had already been touching himself as we were talking. I thought that was so sexy I couldn't help but start to run myself through my sweet pants that I had on. He then started telling me what to do. I absolutely loved him doing this. I was shy but having him tell me what to do helped me relax and focus on doing what he was telling me to do. I was completely soaked hearing his sexy voice. He first had me feel my panties to see if they were wet. Then he told me to go in my panties and start rubbing my wetness all around and over my clit. I of course did everything he asked me to loving every second of it. He told me to relax and close my eyes and enjoy it. I did and then I heard his deep breaths and moans. I started getting so into it I had to bite down hard on my lip so I wouldn't moan. I was too nervous to let him hear me. He then told me he was close and to tell him when to cum. When he asked things I could only let out a short yes or just an mmmhmm without him hearing me moan. I was just about to tell him to cum because I was about to explode when I noticed my mom coming back out to the car. I quickly hung up the phone and adjusted myself so she wouldn't know what I was doing. I was still so turned on and I had been so close to cumming. I hated having her come back out. Then we got stuck in traffic as each bump made me more and more wet. It was the most torturing car ride of my life. This was my first story so I hope you enjoyed!