if u have a sibling does he/she act like a moron?

i think im the moron in that relationship^^"

i have Друзья that act like morons. Does that count?

LOL ALL of my siblings and myself act like morons sometimes. XDD

Thoses are one of the words to describe my sister.(She makes every simple thing into rocket science.)I can't find any other words to describe her....*Sighs from stress.*