Everyone has given you some good advise. I am a mother inlaw, and yes lots of times we think we know best because we have been there already...my mother inlaw was the same way. I know it's hard but to put in my then husband's words "Just listen to what she has to say, use what you want and let the rest go out the other ear". The stuff I had to learn by trial and error I think my daughter inlaw was born with. She is great with my grandbabies and after I realized that early on I kept my trap shut and watched her with pride.