Are you sure she’s here to help you or just looking for a free stay? 🤔 because if she’s here to help you, I don’t think she will have much time to go out so often because taking care of a baby is not just a one or two hours thing and you’re done for the day. If I’m you, I would not let her come to my house daily.
If she’s flying over for a month to help you, but will be going out every other day then she’s more like looking for a place to stay for her holidays rather than helping you. If that’s the case, I would minimize her contact with baby before the first vaccination.