Fusion Relative

A family relation in which there are two relationships at the same time - examples would be if a man has a child with two sisters, those kids would be siblings and cousins at the same time. If a man has a child with a mother and her daughter (from another man) those two kids would be siblings and aunt-uncle/niece-nephew at the same time.

What do you mean Timmy is your fusion relative? He's your brother and your uncle at the same time? Dude take that to Jerry Springer.