WorriedGirl, there's really no way to know for sure if she's drinking again. However, I have to wonder why she would lie about her whereabouts. What is she trying to hide? Also, her hanging around with someone who drinks is not a wise thing for her to do. Do you think she would sit there and not drink if her friend is drinking in front of her? Your mom hasn't been sober long enough to be able to look temptation in the face and say NO. Even if she is not drinking now, if she is with people who are drinking and going to places she shouldn't be, she WILL drink again...it's just a matter of when. I don't know how many people I've heard in AA tell about going to a bar with a friend, or to a place they used to go to, and just ordering a coke. And maybe they would be okay that first time. But the next time, after the coke they would say, "Oh, I can have just one drink," and that would lead to a binge and all the horrors that brings. I was scared enough by these tales that I never have been to a bar since I've been sober. I don't know if I would be able to get sober again if I drank. Now, with the history of liver cancer, I know it would also kill me. I don't even like to go to restaurants with a bar. I feel uncomfortable. And that's after 23+ yrs.
If your mom isn't going to AA and isn't learning how to live without drinking, it's almost a certainty that she will drink again. I know some people who have set it down and never drank again. Some find their strength and resolve through church and their relationship with God. Others just do it. But they are a very small minority. From what I've heard of your mom, I don't think she is one of them.
So the choice now is yours, as to whether you want to maintain a relationship with her or not. If so, it means accepting her as she is and knowing that you cannot change her. If you cut her out of your life, you have to do so knowing that you are taking care of yourself and that to be involved with her is to be accepting a toxic relationship.
My prayers will be with you.