I just got the weirdest phone call! UPDATE!!!!!! AND MORE!!!!!!

So I'm sitting at my desk working and making calls like I'm supposed to when a call is coming in so I pick it up. This woman says her name and says she's been trying to find my mother for a long time. She said if this is the person she's looking for, she worked in a bank with her mom and gave my mom's description. My mom worked in a bank 40 years ago!!!!!! She then proceeds to tell me she emailed my AOL account with this info, but since she got me on the phone to just disregard it. I asked her why she needs to reach my mom and she said to catch up. So I log-in to my email and sure enough this woman emailed me. I can understand how she was able to track me down on my office phone, but how in the world did she get my email address? She was so specific when she said it too! So I call my mom and tell her and she says this woman has been trying to reach her for 2 days and she has no clue who she is or why she wants to 'catch up'. My mom is really creeped out about it, especially since the woman said my grandfather's name!

I emailed the woman back asking her what is the urgency and how does she know so much info. I know people can find info on the internet, but my personal email address and my home number that is not listed? CREEPY!

UPDATE******************
So I told 2 of my colleagues what is going on and they immediately thought scam and then we were talking about it more and one of them said google her phone number so I did. She is a private investigator that deals with reuniting people!!!!!!!

I called my mom to tell her what I found and my mom said she doesn't want to be found by anyone...there is no one that needs to find her. I told her to check with my aunt to see if they have tried contacting her.

I cannot work now. I want to know what's going on!!!!!

UPDATE 2***************
So I've been talking to this woman pretty much all afternoon because 1) my curiosity got the better of me and 2) I dont like knowing that she got all this info so easily and wanted to know why this was so important to her. Since I'm not my mother, she could not divulge much information other than who the person is that they are looking for. There are a lot of similarities between who the person they are trying to find and my mom, but it's definitely not her. The woman told me a few things specifically that is not my mom. I hope whoever is looking for this person finds her soon!