is it wrong to have sex with your cousin ?

is it wrong to have sex with your cousin ?

My cousin and I have been together for a few months. There has aways been huge chemistry between us, and we’re very much in love.
However the question has popped into my head a few times.

Is it wrong to have sex with my cousin?

Is it rare or has anyone else made love with their cousin?

We have not informed the family yet, and we’re going to have to but i dont know how we are going to break it to them