Is it normal to have sex with your half cousin

When i was 12 and my cousin was 13. We was sitting up one night talking about how we had never really had a "relationship" and was talking about we never really kissed anyone. So i just reached over and kissed her. And we just could not stop and one thing led to another and we ended up having sex. The next morning was very awkward for the both of us and we decided to wait to talk about it. At lunch the next day we decided to go eat outside by the lake and we talked it over there. We decided to keep it secret from our parents and family. We also decided to never do it again. But the next night we was talking about feelings and we started to kiss again and ended up having sex... again. Every night for the next month we kissed and "played around" and then decided to straight up ignore each other. We soon found out that this could not work so we again started to kiss and having sex only once a week. And now we still meet up once a month but we don't have sex and we might kiss once or twice. I was just wondering if it is normal to feel this way about your 1/2 Aunts Daughter....Thank You