I had a very very odd situation with the T I saw before XT. I'm a nanny so my only "co-workers" are the parents I work for. The mom of one family about 10 years back recommended her T to me. I went to see said T. When we decided it was okay to move forward with having him as my T it didn't take long for him to start bringing her up in my sessions-like all the time. Not to mention I asked to not be scheduled back to back with the parent I was working for, but he often scheduled her right before or right after me. Now that I think about it-he probably should have been reported for the amount of information he disclosed. Of course I knew a lot about what was going on as I was in these people's home everyday for 9 hours a day. But even so...the T was unable to keep us separate. Needless to say, I terminated therapy with him fairly quickly. Yeah-it was odd. I think in your situation security guard was just making small talk. I'm not downplaying how you feel about it-but if it seemed like an honest slip up and he stopped himself-I think it will be okay. You can Just choose to be mindful during your chit chat with the security guard from here on out.