Husbands friend

So my husband has a friend online. Well today my husband asked for the second time if his friend can move in with us. We are moving out of my parents house finally it's been a year! I told him no I dont know her at all and I dont want my kid near someone I'm not comfortable with. I told him this the first time but apparently shes getting kicked out. I said I feel for her but I dont know her again. I'm I crazy for feeling this way? We have talked about it already but he doesnt seem to get it!