I'm probably being massively PFB but my 11mo has chickenpox and my mum just said goodbye to him and forgot she had a coldsore! She pecked him on the lip/cheek. She apologised straight away (I didn't even notice coldsore as it's in early days so just a red bump). She said she felt terrible so I couldn't exactly be cross. But now I'm stressing. I'm guessing his immune system already will be low. Should i do anything?