<human>: Can you summarize the given text in a few sentences?

So let me just start this off be saying that my boss is a great guy.  I've heard a lot of shit about other Subways in the area, but this one is fantastic. So anyway, I was on shift yesterday, and a food delivery came in. The owner of the store (my boss, of course) was helping one of the managers load the boxes into the freezer and fridge. I happened to be washing dishes at the time, and out of the corner of my eye, spotted a few words written on the whiteboard that we generally use for reminders to do food preps and how much of what kinds of bread to make every day. I didn't think much of it at the time. Fast forward about two hours later.

By this time the food was all put away and the boss had gone home. The manager and I were goofing around when suddenly those words on the whiteboard caught my eye. They read "Helga was here" (all names have been changes to protect all parties involved). So what did I, as the immature 16 year old that I am, do? I erased the name "Helga" and replaced it with "Satan", drawing an elaborate pentagram next to it just for the *Hell* of it.

I assumed this was another worker whom I had not yet worked with (I am still quite new) 

It was the boss's wife's  name. In didn't find that out until today. Apparently she stopped in briefly while the delivery people were still here to help out her husband. But I didn't know this, and now I , the next day have, just received a paycheck for half the normal amount.  I didn't check the check until after I left because had somewhere to be.  And now I'm second guessing myself... Did the boss know it was me? Why did he look so unusually stressed when I picked up my check? Did he try to say something to me as I was on my way out? I did really stay around to chat after all (it was during rush). I don't know if I have a job anymore...
<bot>: I drew stuff on the board and now I don't know if I'm now fired for calling my boss's wife Satan.