We have 2 kids of ages 2.4 years (son) & 2 months (daughter) respectively. While my wife was pregnant, we had worked with our son to teach a fair positive impression about his upcoming sibling & he had also responded quite well. Since the pregnancy, I had taken primary responsibilities to take care of him with fair support & company from my parents, while my wife also tried to do as much as she could. Also, around the age of 1.6 yrs, we worked with him to get rid of the habit of breastfeed by educating him that he is now grown up & he should let his sibling to take that, which had also worked pretty well. After my wife has come back after delivery with our daughter, we found he likes his sister quite well & loves to play with her too. However, we also started noticing a few changes in his behavior as follows, which I would like to share to make sure we are not ignoring any major problem. 1) We heard him saying 4-5 times in past one month that feeding is for sister & not for him, after which he sadly lies down on the bed. 2) He is quite possessive about his grandfather & does not allow him to take his sister at all. Even when I try to spend time with her, he does not take it in the right spirit. 3) Now he is reluctant to sleep with us & prefers to sleep with the grandparents, however, if I sleep with him separately, while the mother sleeps with the daughter, apparently it works better for him. What we are afraid is if he continues to sleep with grandparents, he might feel himself deprived of the company of his parents during sleeping. 4) He looks a little less focused in his daily study (with me), although he has the ability to pick up things really fast. Considering all these aspects, do you think I should continue to sleep with my son separately while the mother sleeps with the daughter to make things peaceful? Please advise in terms of overall well being of the entire family.