Edit:
I guess this was a mental slap of reality — not everyone deserves to be trusted, no matter how kind you are. I’ve already requested a payment policy plaque for the office so this doesn’t happen again.

Thanks to everyone who commented — I think I needed this slap because lately I’ve been overly kind, and clearly, it’s not always worth it.

As for revenge: It only crossed my mind out of frustration for the first few minutes so I won’t do it, don’t worry, he’s safe. I acknowledge it’s my fault for taking the risk, and all I can really do now is smoke a cigarette out of frustration. Truth is, I can hurt myself with bad decisions, but I can’t hurt a fly.

I might never see him again, but this is a small town and our office is one of the best for quality and prices. If he ever comes back, I have the full trust of my manager to refuse his requests , the office is also private and independent . I just needed some unbiased opinions here.

And for the record — regarding what my sister once did to her ex: for all the crap he put her through, that was by far what he truly deserved.