An orthodox scientific answer would be : According to research, HIV cannot be transmitted in a household setting under normal circumstances. However; there were 2 cases reported by the CDC two people have been infected with HIV in a household setting. One is a child whose parents are both HIV positive. The other is the mother and carer of her HIV positive son. Would I take the risk if I am in your situation? No. Even if you don't mind his/her HIV positive status, you should ask him /her learn more about using universal precautions to prevent spreading the virus to your child. And your family should also learn about such practices as well.