how to deal

looking to see if anyone else has a family member like this. My older sister, whom I love very much, is driving me crazy. My husband and I are having a girl and have chosen to keep things traditional....ie we will be dressing her in clothes made for a girl and not a boy. My sister is of the view that you can put the baby in anything and it doesn't matter. we feel differently. she has gone so far as to tell me I'm not going to like some of the things she has bought us. (not sure why she would buy it if she knew it's not what we would want but that's just her). she has no children and is single (hasn't had a long term relationship in almost 10 years) but she likes to talk to me about pregnancy as if I am stupid and she has gone through all this many times before .... she upsets me, our mom has had to step in when she gets pushy because I'm not doing things her way, my husban has reached the point of not wanting her left alone with the baby .... how do I deal with this? I doint want my daughter growing up with the drama but my sister, in what I'm sure is meant to be a loving way, is making it so hard.