My mom is talking to a Muslim guy and I found out what should I do to let her know that I know :S?

I think its obvious it doesn't need any details !!
Anyway I was using my mom phone and I realized that this number is calling a lot so I decided to know who and it never came to my mind that it would be a guy so I took the number and searched via TrueCaller and then it was the guy and I thought that I saw this man once then I asked my mom what was the name of the guy we saw few days ago and it was the name that I found on TrueCaller please tell me what should I do ..!!?!!?
**** I'll keep editing the question so I can reply your answers
It's not easy to talk to her I don't wanna embarrass her .
And about what Rob answered my dad is alive and we live togather in one house we're a great family but I don't know what happened to her .and she talks to him everyday even every night (late) so I dont think its work .
@skyDancer I want to save my family I don't wanna lose them . Though I'm trying to stay away but I can't look at my.mom the way I was ..she was everything for me and now .. I don't know

I think you should just ask. But maybe its a co-worker or something?

I don't understand why you feel the need to get involved with who your mom talks to. Do you feel that she is incapable of making decisions on what is best for her?

You are making a lot of assumptions that need to be verified before you panic like you can't always look at someone and tell their religion, being Muslim doesn't make him a terrorist, talking to your mom doesn't mean there's a romance involved and nothing in what you say says he would be bad for her.

Babylips101 is right. Just talk to her about it.

I agree you're jumping to conclusions.

Also, whatever is happening between your parents is their business, not yours. Although you have an interest, it's not you're place to interfere. Let the adults handle their own relationships. It's not your responsibility to fix or save anything.