When a sibling comes home, older siblings may feel somewhat displaced. Even if parents do everything that is necessary to avoid jealousy, such as paying more attention to the elderly, spending quality time with them individually, enhancing family experiences and the bond between all ... sometimes it just happens.
It is not bad or negative for a child to be jealous of his brother, it really is something evolutionary, but it must be overcome so that it does not become a major problem in a family. When a child does not overcome jealousy, he can begin to have negative and even disruptive behaviors that can jeopardize family harmony and happiness.
The help of the older brother at home
When this happens, an idea is that parents give responsibilities to the older brother so that he sees that he is trusted and that he learns what his role is within the family. You should not feel displaced since you are not, but somehow the older brother feels that the little one has invaded territory, and this is what must be solved.
Always with vigilance and with good work, you can tell the older brother to help you in different tasks such as changing the baby's diaper, doing the shopping, helping you with some domestic tasks that you have the capacity to do ... feel capable of doing things for himself, the satisfaction of getting things because 'he is older' and realizing that the role of older brother is not a problem, but a great treasure. He can be the mentor of his little brother, who teaches him things, who protects him and advises him ...
Make your older son understand that at home you are all a team and for there to be harmony and love, you have to help each other and that he is already a great helper.