Your risk depends on how likely it is that your daughter and her family are exposed to the virus. Where does she work? Where does her husband/partner work, if there is one? How careful are they?
To be honest, if either of them got Covid, I would have thought that there is a good chance that your dgd would get it too, even though she may show no symptoms. That would mean she could pass it on to you, even if your daughter doesn't come into your house.
You need to do a risk assessment based on their whole family, and unless they are virtually self-isolating, the only way you can really stay safe is to stop all contact with any of them, including your dgd.