My husband shower a lot of love for his sister after she deliver her baby. I feel jealous and I think I should love her sister like how he love his sister.. But I am too jealousy...

It's quite natural to feel this way but siblings love is a different kinda love and I feel as parents we would also want our children to love one another. Still it is important to address it as soon as possible so as to avoid uncomfortable situations in future. This can also cause awkwardness. Do have a good talk with your husband and tell him how you feel(: