GC Holder being denied entry? Semi-complicated situation

I'm really hoping someone can provide some advice for me. I'm pretty desperate and very stressed. I have a bit of a situation and am trying to find out if my mom being banned from the US and some statements she made would have an affect on my own admission to the US and future consequences for her.

My situation: I am a Canadian citizen living in the US with a conditional GC good for two years, I received it less than a year ago.

My mom's situation: She only has Canadian citizenship. She was refused entry and banned from coming when she flew by herself into San Francisco because she overstayed a previous visit by more than 12 months. She said she didn't know that she overstayed since there was no I-94 or date stamped onto her passport but they said ignorance is not an excuse. They questioned her for several hours and even quizzed her about my dad's previous visits to the US and inquired about where I was. I think she got really scared, she said the immigration agents were very threatening and kept on telling her that they will throw her in jail. She wasn't thinking straight and when they asked her about where I was, she told them that I was in England even though I am in the US.

I am suppose to go on a vacation to Mexico next week but now I'm worried that if I go in and out of the country for a week it may have some sort of negative consequence. Am I now red flagged and would there be a chance, even a remote chance that I may be denied entry or anything else because of my mom's statements about me being in England? Since my mom told them I am in England, they will clearly know that is not the case when I return from Mexico, also I'm just worried this may have a further consequence for her if we try to apply for a waiver of her ban and later apply for a GC when I become an US citizen.

You are in US now. Since they were able to track your mom's wherabouts and she is undocumented, don't you think they know where you have been?

Where are you and your US spouse living?