I have use to have that problem with my son, well he is still young but i watch my sisters 17 month old and when we have a few days without him he use to push and hit him all the time for a day or two when he would come back, it could be that he likes the one on one time with you and than when she comes back he is upset and what better way for a four year old to tell you than to beat his sister lol. i would just start talking about her coming home the day before and maybe let him help you get her stuff ready, like make her bed for when she comes, that way he is already adjusting to her being back home before she gets there. just a suggestion. |