Need some advice and have looked for similar problem but I can't see it. Have a dd of 20m who spends one day a week with Grandma who is also a child minder. She has developed a habit of biting, pinching and hitting when frustrated with me and dh. My strategy was hold her, look her in the eyes and tell her no hitting etc in a firm tone. DH does the same. She usually does whatever 3 times in a row so after 3rd time of telling her off we put her in naughty place. She responded well at first and I thought we had break through... Now she laughs whilst being reprimanded and takes herself off to naughty place adding a few fake tears in for effect! Taking its toll now though, she is meant to be going to nursery soon and I'm over due with 2nd baby. Is this just a reaction to baby on the way or am I doing something wrong? Sorry to be so long winded but I wanted to explain without leaving anything out. Any help gratefully received.