Hi , If your fiance has an active hep C infection, there is a risk of transmission even if you are in a monogamous, heterosexual relationship. Although the risk of hep C infection from sexual contact is low, it is still possible. Hep C is transmitted via blood-to-blood contact, so exposure to blood during sexual contact (or any other activity) can increase risk. Please be careful, and use protection if possible. This article has some additional information about hep C transmission: https://hepatitisc.net/what-is/transmission
Is your fiance considering getting treatment soon? We strongly encourage them to speak with a doctor to get treated as soon as possible. Untreated hep C can cause major health complications like cirrhosis. This article provides some information about hep C treatment: https://hepatitisc.net/treatment
I hope this was helpful!
-Jessica, Team Member