Thanks for your query at DoctorSpring.com
I can understand your concern.
HCV doesn't usually spread through oral sex unless the person has bleeding sores or ulcers or any other source of bleeding in the mouth.
HCV doesn't transmit easily while having regular sexual intercourse in a monogamous relationship. But high risk sexual behaviour can increase chances of transmission like multiple partners or rough sex where there is bleeding.
HCV has 5% chances of transmission from mother to child.
Please go through this link.
Please let me know if you have any queries.