Good Job ! Excellent situational awareness.
I would have done the same thing if I were in the situation. The deal with them in the same store and talking to each other on the phone is a good indicator that they were into something. It sounds like they were casing the place. They had someone on the inside feeding real-time info to the guy on the outside.
If it was not a soon to be incident, the actions of the male/female would have warranted your response anyway.....too suspicious.
Usually people dont go to liquor store to window shop or mill around, they are there to get what they normally get and hit the road.
As far as calling the police, you could , they could gather the info that you had, and maybe get the video tape to see if they could tie the male/female team to another incident or maybe identify them and notify the patrol division to BOLO for them and possible future activity.
Glad your ok, it could have went downhill quick.
I had a situation one time when I first got my carry permit. I was at Target in Knoxville. I was walking out to my car and I noticed a man standing next to a van several stalls down from my car. There was a woman in the van and she was yelling at the man. I paused for a moment and then unlocked my car and got in. As I started my car, I looked out the rear glass of my car and I noticed the same man walking around my car. He stopped at the back and looked in the rear glass of my car. At this point, I drew my 1911. The man came around the driver's side of my car, as he did this he was reaching into the interior part of his jacket, as if one would have a shoulder holster on. I brought my 1911 up to my chest and angled the muzzle toward my window and I rolled down my window. I lost sight of the man til he got to my window. The man reached out with a white card, then he looked down and seen what I had in my hand. His eyes got real big . The man was posing as a deaf person and was pan handling for money. I told him that he had better go somewhere else because it was not safe for him here. The man just looked at me with his hands raised and said " I am sorry buddy, I dont want any trouble". The guy then left , at a high rate of speed.
Situational awareness pays off.....even if the situation doesnt turn out to be what it seems, better safe than six feet under.