Should I let her ?

So we live in a mobile home park. The house are pretty close to each other. I have a 8yr old girl and 2 yr old boy. There is this girl about 6 yrs and she is always coming to knock for my kids to play but i keep telling her they cant. My husband is getting mad at me saying that for me to just let the kids play with her but I already told him we have to be social distancing. Am I wrong? I dont know her parents or who they are around. Same thing with us. I dont want to risk my childrens or us