Cold sores

So My son is a month old and my mom gets cold sores she’s not showing symptoms now but I know that doesn’t matter.

But she’s always picking my son up and doing baby sounds to his face as she hold him and I’m always hovering over her like no don’t be all on his face because of it and I just get so protective to the point where I don’t want her to hold him at all God for bid anything there is not good outcome with babies and herpes. My anxiety when she’s around him goes through the rooooffff!!! I don’t know how to act or talk to her about not holding her grandson so much or not coming over because of it 😓😔