He would seriously listen to you and respect you more if you grew up a bit and stopped being so competitive and childish.
ACT like a bhabi, and then be treated one like too…if your acting like a spoilt, insecure jealous wife then it won’t do your marriage many favours. Show your husband that your above all this pettiness and open your heart a little. SO WHAT if he’s got this bond with his sister, I mean they grew up together. You guys didn’t so of course your bond is different. Don’t be jealous as your only gonna eat yourself up alive, it’s a self destructive emotion, clear your heart and become a more giving, loving open wife and he will always respect you and love you more for that.