If a hiv free man gives oral sex to hiv+ve women will he get infected?

Unlikely: There is little data to support an opinion one way or the other, but no definitive evidence to show this is a route of transmission of hiv. Theoretically it could happen, but salivary enzymes inactivate hiv, so unless secretions containing virus reach behind the oral cavity to lymphatic tissues, including tonsils, it seems as if this would be hard to occur. No such cases have been documented.