Pregnancy

So in early July of 2018 I had a miscarriage. Well later that month I felt weird so I took a pregnancy test and it was positive. Went to the doctor and everything we didn’t tell anyone including our family til I was 11 weeks. Well my sister in law hates me. Always has. Well we told our parents we were pregnant. His parents told him siblings before we could but we didn’t know. When I told his sister we were pregnant she said “ok I already know” and I said oh sorry and asked when her and her husband were going to try for a second child (they were talking about trying for another to Everyone) and she said at least a year. Well we find out our gender and about a week later she invited all of us over to her house and tells us that she is pregnant. My husband and I figured that it was just random timing and not on purpose and were happy for them. And told them congratulations. We go home and look at a calendar and realize she got pregnant a week after we told them about our pregnancy but still we didn’t think anything of it and we were like well now our son will have a big cousin and a little cousin. Then we announce it on Facebook that we are pregnant and having a boy. His sister posted it about 10 hours later that she was pregnant (she was only 7 or 8 weeks) (we didn’t think anything of it we were just scared for her since we just had a miscarriage) well then their mom wanted to throw our baby shower. But has made me do everything and buy almost everything. Our baby shower is in the middle of March and I am due mid April. She is also planning his sisters shower and is buying everything and doing everything. Also his sister is due end of June and her baby shower is the weekend after ours. Also every time we get something for our baby. His mother asks where we got it and then buys one for his sister for her baby. Also when we tell them about the baby appointments everyone acts like they don’t care (on his side) but when his sister tells everyone they all are so excited and ask lots of questions and everything. Also his sister has to be the center of attention all the time. So I feel like they will spend some time with our baby but as soon as her baby is born they will treat our kid like crap and be all over her baby. I just don’t know what to do or think. My husband also says he doesn’t understand why they are like that. Also when I talk about the baby like he just kicked or something she will also he like oh my baby just kicked and then talk over me and make it about her and her baby. Don’t get me wrong I am happy for her. It’s just I wish they thought my pregnancy was important also or acted at least a little excited about the baby. Sorry I know that was long and confusing. I just don’t want my baby to feel like he is less important to them or not loved as much as her child. Especially since they hate me. I don’t want my baby to feel the same way.