Let me tell you a story.... My mom came with me to freshman orientation.... groups of kids in my major were placed into a rooms with their parents and we all had to stand up and introduce ourselves. She had never seen me do this before. I stuttered the ENTIRE way through.... After, my mom cried to me and told me she didn’t realize how much it affected me and how hard that must have been. I told her yes, it does suck, but I’m use to it. In the coming days, I met all the guys on my dorm floor (without her) and we all became friends. She came to see me at my dorm and saw that I was doing fine with people. After that, she had an easier time accepting my stutter also. People who stutter are almost always strong people. We are faced with such a public display of adversity that we literally just have to accept. Did it pose challenges to me and give me nerves? Yes, every single day. But I’ve always worked through it and it sounds like your son is the same. In college is where I gained the most fluency BECAUSE of all of the challenging moments I had. One thing that helped dramatically is group speech therapy with other people who stuttered. It JUST so happened that the college I was at did a lot of research in stuttering (Purdue). I loved group speech therapy for the tools they taught me but mainly for the acceptance and the normalization. Perhaps try to see if your sons college has a group speech therapy? Also, since I was a student, it was mad cheap.