I am a new mother of a 7 month old baby girl and have a 5 year old step daughter. I've been with my husband for 3 years and his 5 year old daughter has been living with us for a year while his other daughter is 6 and living in another state with their mother. Recently his 5 year old has been acting out more and more. It started out with little things like talking back and drawing on the wall with crayons but she started getting worse. We started finding things hidden in her room that she took out of our room like my iPod and money out of a little jar. She gets punished by either Time out, a slap on the hand, a spanking, or if it's really bad she gets grounded and she has to sit on her bed for an hour. Well she was being really good today so when we went to the store we were going to buy her something. At the checkout my husband noticed something sticking out of her pocket. It turned out she had wanted a thing of lipgloss so she tried to hide it. Anytime she gets in trouble for something she says she doesn't know why she does these things but her brain tells her too or she misses her sister that's out of state. We try to show her as much attention as possible especially with the new baby we don't want her to feel left out. We just don't know what to do anymore. We have a doctor appointment to try to see if she can tell us anything but that's the last thing we can think of. Can anyone give any suggestions or tip we could try?