Over dramatic or ...

So my mom tested positive for the Flu about a week and a half a ago she was super sick now she recovered and is back to her normal back to work and everything she is asking for my 4 year old to go over I don’t want to be mean but I told her NO because I know she didn’t disinfect her whole house and when my daughter stays over she sleeps in my moms bed with her plus I have a 4 month old at home and I don’t want my daughter bringing back any flu germs to the house am I being over dramatic or is my daughter fine going over ?