No respect from in-laws!

It all started with the comments about how I wasn't breastfeeding properly because LO won't latch. Even though I spent and hour and a half with a lactation specialist today to find out my LO is nipple confused. Which isn't a big deal as I planned to pump and bottle feed anyway once I go back to work. Then they got mad at me whenever I got emotional and told me to knock off the "baby blues". Well I'm sorry I had my little girl a week ago almost and I'm still very hormonal on top of I feel I may be suffering from post partum as my husband has been a piece of work since my little girl was born. 

The real issue here was this... my step son came over for the night and wanted to meet his little sister. He's only 3 and yes I wanted him to bond, but under my conditions. This instead turned into my father in law sweeping my child away from me and placing my 6 day old baby into his arms after I very firmly said, "NO". I was not comfortable with this action, they went beyond my consent, and then proceeded to call me a hormonal bitch after because I was so shook up with anger I left the room mumbling, "I said no". Here is the kicker! They didn't even have my step son wash his hands after trick or treating, after he opened candy and slobbered all over his hands... I'm so angry. But, I'm being told I'm making demands... how do I even deal with this situation?