YSK: If you are a parent in a joint custody agreement, don't trash the other parent or other side of the family while your child is with you, even if you think they can't hear you.
from /r/YouShouldKnow
YSK:如果你是共同监护协议中的父母,当你的孩子和你在一起时,不要对另一位父母或家庭的另一方进行抨击,即使你认为他们听不到你的话。