First let me start off by saying I am very appreciative of my in laws and what they've done to help my family.. But they need to back off. I am an early childhood educator and have worked with infants for years. I have knowledge(probably too much)  about everything that can go wrong with an infant, and I have decided to raise my daughter in the safest environment I see fit(ex: not sleeping on her stomach until she can roll/lift her head, getting her used to sleeping on a flat surface(sleep training), not putting any junk in her bed(pillows, blankets),etc.). Every time his mom makes a comment about how I should do something.. And I state a very valid reason as to why I'm choosing not to.. She gets kind of argumentative and keeps bringing it up. There is a point when the suggestions are no longer helpful and I feel as if she's just trying to boss me around... I understand fully that she's raised 4 kids.. But I want her to respect that I have experience and know how I want to raise my daughter and I'm tired of feeling like I'm dumb/wrong. I'm really having to bite my tongue to keep a good relationship here and it's getting hard... Advice??