Annoying People

My sister n law and I dont get along well. She is not a very nice person to begin with and we did not get along before my brother married her. Afterwards I tried to but she is the kind that once you start to try to like her she does something to make you not (like catching her in lies and what not). However, everything I do she does and it is the most annoying thing. She will buy the same purse as me, coat, go tanning when i do, got a tattoo right after i did, colors her hair the same and just EVERYTHING!! It is pretty annoying. I dont know if she is trying to be me or what is going on. Now we both have 2 girls ages 5 and 6 and I notice the same thing. I will go buy my daughter and outfit or something and in the next few days her daughter is wearing the same thing. Sooo annoying lol. Its fun to buy stuff out of town, then they dont have much of a chance lol.