In-laws

I really just need to vent I love my in-laws dearly but they drive me crazy sometimes think everybody loves Raymond in laws especially my sister in law ever since my baby was born she has been constantly telling me what to do or how to do it. She doesn't even have kids but she's been telling me I need to stop breastfeeding and switch to pumping or formula cause it's not fair that only I get to feed him or she will tell me he's not hungry then go hide or the most recent when wet decided to move him into his own bed she said it's about time here's how you should do it or you'll regret it. But then she says to my hubby make sure you guys leave him alone she can't go grab him whenever she wants to or it will never work. Now I try to be a peace keeper and not say anything but I really just want to get snarky and ask how this all worked with her non existent kids. My sweet husband just isn't bothered by stuff like this so it just roles off his back. But I point out how it's really bothering me that she seems to think we can't raise him and while he understands regardless of what he says to her she won't ever stop.