Child of a person's father with that same person's maternal aunt or child of a person's mother with that same person's paternal uncle.
My three-quarter-sibling is a good person.
When a man and a woman have a baby together, then the woman realized she chose the wrong spouse when she met the man’s brother. They decide to have a baby together. These two children are known as “three-quarter siblings.”
“Dude! I heard she fucked his brother, and had ANOTHER kid! They are going to be three-quarter siblings!”
1- Child of mother and of uncle (father's brother) simultaneously.
2- Child of father and of aunt (mother's sister) simultaneously.
3- Cousin and half-sibling simultaneously.
1- First cousin and half-sibling at the same time.
2- Child of mother and of uncle (father's brother) at the same time.
3- Child of father and of aunt (mother's sister) at the same time.