An example of how attachment disabled kids can come between parents:
Mom, Dad and three children go out to lunch at a new burger joint.
Dad orders food while Mom and three children sit at a table. Troubled child gets all bent out of shape about the seat he chose to sit in and wants to move. Mom tells him to stay there and he pouts.
Pouting stops after food is in front of him. But not for long. He is upset because Mom does not allow him to drink 20 oz of lemonade in two minutes. Upset because we bought him a grilled cheese sandwich. Upset that Mom does not allow him to dip every inch of french fry AND his hand in ketchup. Doesn't like the way his sandwich tastes, etc. etc.
Mom is irritated because they had just spent over $40 on lunch and troubled child is trying to ruin the outing. Dad is irritated and yells at Mom to "just let him eat, why are you letting him bother you so much?"
Dad leaves table for a few minutes. Everyone is nearly finished eating. Troubled child has a few sips of lemonade left in that 20 oz cup that is now in front of Mom. Mom asks troubled child if he would like the rest of the lemonade. Troubled child glares at Mom and does not answer. Mom asks again. No reply. Mom looks away for a few seconds. Troubled child quickly grabs lemonade from in front of Mom, hides it under other arm and starts to drink the rest.
Oldest son notices the strange behavior and alerts Mom. Mom asks troubled child if he wanted more, why didn't he just say yes? Three sips of lemonade is thrown away. Troubled child cries and makes a scene in burger joint. Mom tries to talk with troubled child but his "crying" gets louder and more noticed by the crowd. Dad comes back to the table and asked what happened. Dad is debriefed. Dad tells troubled child to stop crying and to get his coat on. More wailing while coat is being put on by Dad.
Mom, Dad and three children get in the car. Troubled child "cries" but more like excretes saliva, snot and tears all over himself while making goat like noises. Mom is more than annoyed. Dad again asks Mom why everyone is so upset. Mom explained again. Dad is irritated that Mom is so agitated. Mom asked oldest son to back her up. He does. Everyone is irritated by troubled child. Dad tells Mom to just ignore troubled child and stop talking to him. Mom is irritated that Dad seems irritated at Mom. Mom feels at fault for entire issue, but also just plain angry. Surprisingly, active three year old preschooler got through entire outing without one single issue (besides not wanting to eat sandwich either).