I know I’m a bad person but

My husbands sister has a lot of medical problem and opted at the age of 22 to have a hysterectomy. So obviously she can’t have kids now. I just had our second baby 10 days ago and I cannot get rid of her! She pays no attention to our three year old but is CONSTANTLY up my ass about the baby. My mother in law has offered to take our three year old a couple days a week so she can get time away from her sister and alone time but every single time my sister in law shows up to spend the WHOLE DAMN TIME here holding my baby. Yesterday was my daughters Christmas program at school and the first time we took the baby out in public and I couldn’t even hold my own baby. I’m trying to not be rude but she’s starting to wear out a welcome. I want bonding time with my new born and more importantly when you’re in my house my girls are equal. You don’t obsesses over one and sigh heavily when the other wants your attention. To make matters worse she judges EVERYTHING and tries to give me parenting advice when aside from her dog she’s never taken care of a damn thing. I don’t know what to do because this woman is so protected by my in laws it’s not even funny. She has no job, still lives at home and her parents dedicate their whole lives to keeping her happy. So I know if I say anything it’s going to start a whole lot of drama between my in laws and my husband and I don’t want to our him in that position. I feel so stuck in a situation with no way out.