Needing suggestions-MIL

So my husband and I have a 1 and half month old daughter. For the most part, I have my daughter every day but will return to work soon. Problem is that when I have an appointment or something I must attend my mother in law gets to keep the baby for a few hours. Every time we go to pick her up the MIL gives me some opinion of how I am parenting wrong. Example: Instead of feeding baby on demand and when she is hungry I should get her to a schedule where baby gets her last bottle at 10ish every night to hold her off longer on waking in the early hours of the morning. Well how the hell do you tell a newborn "no, you can't eat yet because we need to wait longer and get you on a schedule?" I have tried to get infant to take a late bottle but she eats on her own timeframe obviously. Also get lots of other opinions on how to do things correctly from her but she hasn't been a parent to young child in over 35 years. Things have changed, New methods discovered, etc. We already have history where she has treated me like a dog and been extremely nasty to not only me but my family as well during functions like our freakin' wedding, family dinners on holidays with both sides of our family, and even Christmas for Pete's sake. Members of my family end up feeling verbally attacked or treated like crap in MY home and I'm about tired of dealing with her period but have to because of my husband. What is even worse is my husband rarely sticks up for me or speaks to her about these issues as he is definitely a mommas boy and always chooses her happiness over his own wife/daughters. Advice?