3 year old hates mommy?

I would be sure to tell her (she is so young) that Saying "that is not acceptable & is not something we are allowed to say". I would also keep saying after she says that "Well I Love you very very much"..Just keep gently reminding this. Sorry, I do hope it gets better, I have not had to go through this yet, but I do have a friend who had a VERY similar situation to you, & her daugther things her parents (The Grandparents) hung the moon & her mom is "mean". But her parents (The grandparents) took care of her A LOT!

First give it time. It is a phase. My daughter has days where she looks at me and says"I want my daddy". Or she'll say "I wish my daddy were here" But daddy has to work. Unlike mommy who works from home daddy goes to the office. If the kids see it gets a reaction, then they keep it up. Tell her to fake a smile and after a time she may stop. Soon she'll be too busy to think about it. Not too long til kindergarten.

Oh! My kids hate me every time I sday No to them for anything. So did my nieghbor's kids hated ther mom. Kids love only those who givce in to them. lol. My nieghbor had a black board hung on a wall where kids could write and everytime they were scolded for anything, Kids used to write, my mom is very bad and we hate her and then somedays when they felt all love for their mom it use dto be Greatest Mom in the world or something, like that. She used to say that the board has helped her kids to take out their feelings and allowed her to take the praise and hate lavished on her in her stride. Tell your cousine todo what she thinks is tright for the baby and leave it at that and evne talk to her daughter about it at length explaining her position as best as she can,even though the kid is small, it will be a good start at bonding with her.