You get a call

Once you're home, you immediately grab your laptop and open up a porn website. You had quite a bit of excitement today, but you were still pretty horny. You immediately open one of the glory hole videos again, which you watched several times during the last days, but then you hesitate and searched for something else. After a few minutes you finally found what you were looking for. A brunette bairmaid is bent over the bar and screaming her lungs out while a muscular man is plowing her pussy from behind. Mesmerized you stare at the screen while your hand slowly glides under you panties and starts to play with your clit. You're careful not to rush it, so your movements are fairly slow while your eyes are still glued to the screen. After several minutes you pick up the pace and you start to squirm, when suddenly your phone rings. Breathing a bit heavily you answer the call. It's John. "Hey, thank god, you're already home. Listen, Susan just had to leave, her little daughter is apparently sick. Nothing serious, but she wanted to be with her anyway. That means that I don't have anyone for the bar today, the other girls are on vacation or have other plans already. Are you free this evening?" You explain that you haven't made any plans yet and agree to be there half an hour before the club opens.