Is it wrong that I fucked my cousin?
Why did you sleep with your cousin?
I thought it would be exciting.
You should not have sex with people who you are related to. If anyone found out you did this, they would judge you severely and your family would most likely stop talking to you. You should find someone not related to you to start a relationship with.
It's okay, my parents don't care.
If your family doesn't care then I would assume this was done by accident. A mistake like that should only happen once and I hope you will be more aware of who you are sleeping with in the future.