A: It sounds like your little one is sleeptalking or in this case having confusional arousals/sleep terrors. These are the exact same thing as sleeptalking and sleepwalking, but just more dramatic. If this is the case, there is nothing to be concerned about and it has nothing to do with his relationship with his older sister. These behaviors during sleep typically run in families and are more likely to happen when a child is not getting enough sleep. So be sure to institute an early bedtime.