My mum received her Green Card decades back from a marriage after a divorce with my dad and had not been permanently living in the US. I came to US in 1997 as a student and after graduation, I was able to get H-1 and subsequently a Green Card and has been working since then and settled permanently in the US. This June will be my 5th year with my green card and I am planning to apply for citizenship. My question is, my mum is wanting to come to US this May to visit me and to see her grandson using her green card. I know this is a huge risk and she may get caught but I have a hard time telling her to give up her green card since I cannot guarantee she can get a visitor's visa for keeping her green card and not living in the US all these time. My question is, if se does get caught at port of entry, will it affect my current green card which I received via work and also my citizenship ? Thank you all for your input !