How to deal with uncontrollable MIL

This might be a long post and I’m on mobile so I apologize in advance for formatting. I’ll do my best to make this post bearable to read.

My MIL has always been a handful but it’s gotten increasingly worse over the past few months. Like, so bad that I’m at the point where I want to ban her from coming to see her grandkids. I’m going to list a few of the things she’s said/done over the last few months that have driven my husband and I up the wall.

• She moved in with us with the intention of helping us take care of our two kids (17 mo, & 6mo). At the time of her arrival, the kids were 12mo and 2 mo. However, she would leave my infant laying on his back at all times and lied about doing tummy time with him, so now he has a slight flat head.

• would go around telling everyone and their damn mama about how she was our maid, our babysitter, primary caretaker of our children and that we were unfit parents and didn’t know how we’d survive without her. (News flash: she wasn’t. I cooked for her every day, I did her laundry, and I shouldered almost all of the childcare duties with minimal help from her.)

• our electricity bill went from $160 to $400 because she left all the lights on, left the AC running at all times even though we told her countless times to be mindful of it. We asked her to pitch in with the bill since we were coming up short because it was such a big surprise. She said, “no way, that’s your bill, you take care of it.”

• lied about many different things to pin my husband and I against each other. We’d argue because of the misunderstanding and then when we found out that both of our perceptions of the truth were misconstrued, we’d confront her, and she’d play dumb to our faces but double down on her lies when she spoke to us individually.

• would barge into our bedroom unannounced without knocking whenever our eldest would cry from nightmares at night. She’d try to snatch him from us, and when we’d tell her that she can’t just come into our room like that, she’d literally sit in a corner in our hallway, curl into a ball and scream like a child, like she was dying.

• she’d tell people in both sides of my husband and I’s family that we don’t feed her, or our kids, and that they’re all suffering. I’ve had people from my family come visit and literally examine the kids head to toe to see if they are getting thin because of the outlandish things she’s said.

• my husband and her got into a huge fight due to her slandering us, saying he’s had enough. She threatened to leave, to which he said, fine, we’re not going to stop you. So she left that day with all of her belongings, and then spread rumors and lies to our family (MY family included) that he forcibly kicked her out of our house and left her with nowhere to stay. Another news flash: she’s got a house of her own a few hours away. She’s obviously not homeless.

Now, I’m at my wits end. She’s never been good with money and has never paid a bill in her entire old-adulthood-life. She lived with my sister in law for years to help raise her son, and when she ruined her relationship with my SIL, she jumped the gun and moved here to live with us, under the guise of “helping raise our kids”. But she’s done nothing but ruin everything, cause division in our household, and weaponize our own kids against us. Now that she lives on her own in her house, she has the sole responsibility of paying for all of her bills. She’s bored by herself and asks my husband to have our eldest for a whole week to take him on “vacation”, to which he said absolutely not.

To be kind, we sent her photos of our kids swimming the other day, and she blasted it all over her social media as if she was the one who took the pictures. She’s actually spiraling, posting about how a mother’s love is “unconditional” and that she “did nothing wrong” and “never lied”. She claims we’re being cruel by withholding our kids from her. Still doubling down to everyone that we kicked her out and had no regard for her well-being or safety. All my husband wants is an apology and for her to acknowledge that her behavior has been off the rails and totally unacceptable. For her to change. But my SIL herself said that she’d never apologize and never change. We’ve observed her patterns of behavior and came to the conclusion that it’s true, she’s just not going to budge.

And now I’m stuck, because I have never been the type of person to shun any of my husband’s family. He’d never do that to my own family (which are troublesome in their own way, granted) so I feel like it’s only right that I do the same for him and show the same respect and love. But his mom is a walking bomb and has caused us so much trouble and distress that I really don’t want her to come back. She’s starting to act erratically, we can see it from her social media and the things she’s been telling my SIL who tells us everything.. and it’s just not looking good. I don’t want our relationship to be permanently damaged but it feels like there’s nothing we can do if it’s all coming from her end and not ours. We’ve handled everything quite cordially and respectfully honestly. I’m tired and exhausted raising my two young kids and the last thing I want is family drama and financial problems.

What would you do in this situation? I need help. I don’t want “no contact” as an option because it’s not possible in our family. I feel like we’ve enforced boundaries and have stayed true to our word to a T but her behavior is just unmanageable at this point.
Thanks in advance for reading and/or responding