Crazy mil accusations

So I have a young child, as everyone knows when they are 2 and 3, they are in the “terrible t’s“ and will throw fits over every little thing if it doesn’t go their way. All parents basically know this, except her apparently. Tantrums are the worst, they scream and cry. But it’s what they do! She automatically thinks tantrums equal abusing them. Like I said, my chbild is in this stage in life. Tantrums are thrown sometimes when being told “it’s time for bed, you can play tomorrow”. Why? Because children love to play! But no, TWICE she said “it’s like you abuse your LO” then told me not to discipline LO, because “that’s abuse” or some ducking shit. Hello, as a mother herself she should know you dissolute your child when they aren’t listening. Like you’re in public and you tell them to stay by you and they run off. What do you do? Give them a little pop on the booty and carry them until they decide to listen. I can’t even put LO in time out, my mil barges in and picks my LO up and takes off. I don’t know what’s her problem, but I’m getting so sick of it! It’s my child, MINE! NOT hers, so she needs to butt the fuck outta here. I’m sorry, but what the fuck! She knows hearing her accuse me of that makes me cry, but I’m literally on the verge of leaving and her never ever seeing LO again. I’m so sick of crazy mil’s