I don't know what to do about?

My sister in law I don't get what her problem is. She always does what I do, and is very annoying. First I got pregnant so towards my mid pregnancy I found out she got pregnant too. Second I went to buy a new car so guess what she also went to go and get a new car.. I fixed my babies nursery of clical winnie the pooh. Everything I do she wants to do the same thing I don't get it.. I had a boy, she had a girl, But when I was pregnant I kept on saying that if I have a girl I was going to name her Madeline, and Joseph if it was a boy. So she named her daugther Madeline. Okay That was 3 years ago. And she just had a baby boy, and she named him Joseph... When I go over to her house I can't get up to throw something to the trash That she looks at me from head to toe.. She's rude to me, and I never say anything in respect to my husband; but I'm sick and tired of her... So Should I do please help..... Thanks in Advance