I am pretty sure this wasn't your intention but that response right there sounds really bad to me and gives me the inclination that I wouldn't want to schedule with you.
"Like I said the guy was quite chatty, and I was actually the one to finally say we better get to business after an hour had gone by. I actually did also let the session go over by about 20 minutes, but I did actually have another appointment after him, which I was subsequently late to (luckily it wasn't a problem). "
You just basically said you are ok with blowing off the next appointment, something anyone with a bit of experience in this lifestyle would find a negative, glad it "wasn't a problem", but then you follow it up with...
"I would have probably let things go over a little bit longer, I did ask if he would like to extend his stay by paying to upgrade his time which he declined"
So you were willing to be late to your next appointment, and you would be willing to ignore your next client, whom as far as we know has never seen you, simply because you let one run over. And then you state you were willing to extend the session if he paid more? Literally saying you won't "fuck" the next guy, which is what you did.
Doesn't really sound fair to the next client, or anyone else who was interested in scheduling with you...
It's your life, your body, your price structure, but Lady, that right there tells me I probably don't want to be a client of yours.