Question: gave birth to our second child a few weeks ago so I'm sleep -deprived and running Question: gave birth to our second child a few weeks ago so I'm sleep -deprived and running low on patience. In the meantime, my 3-year-old son has become another person. He has regressed with potty training; he isn't cooperating with me about anything; and he laug hs when I put him in time- out, like it's a joke. I find myself yelling and threatening constantly. Is this directly related to having a new sibling? If so, will it pass? By the way, he seems to like the idea of being a big brother. He's very sweet to him and tries to help me when I'm tending to him. I doubt that your son's metamorphosis is a response to a new sibling. The fact that he's Answer: helpful and caring toward his new little brother indicates that he's making a good adjustment in that regard. I think you're having the adjustment problem, not your s on. You told me what the problem is in your first sentence: you're sleep -deprived and low on patience. Consequently, you've lost a grip on your authority. Your son has picked up on that and is acting out. At this age, his self-control is far from fully establi shed. It's directly related to your self-control, which is the essence of your authority. You lose your self-control (e.g. yelling and threatening); he loses his. It's as simple as that. I've said it many times, but it bears repeating: The successful discipline of a child is not accomplished by manipulating reward and punishment with things like star-charts and time-out. Behavior modification is a form of manipulation. The successful discipline of a child is accomplished by mastering the attitude that constitutes natural authority. When a parent conveys a natural authority in his or her behavior, a child will submit, naturally. And just as it is in my best interest to submit to legitimate a uthority, so too is it in a child's best interest. In so doing, the child becomes a disciple. He begins to develop respect, which is the first step on the path to good citizenship as well as a sense of self-worth. The attitude in question consists of four qualities: You act like you know (1) what you're doing, (2) why you're doing it, (3) what you want, and (4) that the child is going to do what you want. It's an attitude of positive expectation. Without that attitu de, no method is going to work for long. With that attitude, you won't need methods. While talking with an older friend of mine about his childhood, I asked him what methods his parents used to bring about his obedience. He thought for a moment and said, 'There were no methods; the expectation was perfectly clear.' That's it! That's why, for example, I maintain that 'Because I said so' is a legitimate expression of parental authority. First, it's the truth. Second, it's perfectly clear. The act of explaining one's instructions to one's child usually conveys insecurity. Explaining is a form of pleading. It is not consistent with an authoritative attitude. As such, it usually results in arguments and disobedience. From that perspective, there is no such thing as an argumentative child; there are only parents who open wide the door to argument. If you are sleep-deprived, then perhaps you need to convey to your husband the expectation that he give you more assistance with the kids so you can take a rejuvenating nap during the day. Maybe you and he can alternate getting up to feed the baby during the night (assuming you aren't breast - feeding). Perhaps you should hire some temporary help during the day until you're feeling yourself again. In any case, you need to do something to help yourself regain your parental balance before you slip into full-blown post-partum depression. In short, the solution to this problem with your older child is for you to take better care of you.