MIL tried to have me fake arrested, lied to family, planned an event on my wedding date, and now family are backing out of my wedding. Do I expose her or be the bigger person?

Back story, I have been engaged for 5 months and our wedding is next month. It has been absolute hell since we announced the engagement. She tried to plant fake texts where my fiancé tells her he’s back with his ex or messing around with his ex. Those were proved to be fake cause I checked the contact name and it was her own number saved. I sent a text and it came right back like if you text yourself. She’s just been saying she’ll die of a broken heart cause I’m taking away her baby stuff like that. So I’m at the apartment and I get a knock on the door by some guy wearing a uniform but a half assed one. Told my fiancé and he opened the door and the guy said he’s an undercover cop and I’m under arrest because I’m married and unlawfully trying to get married again. Asked for badge and he couldn’t provide one. I called the cops and none of them could verify if a cop was at my location so I had him arrested. Before the cops showed up we told him cops are on their way and he nearly broke down saying cancel them, some woman payed him to have me arrested and he’s not a real cop. He provided a name and it’s my fiancé’s mom. What I’m pissed about is where he was going to take me once he did the arrest. Anyways he’s still in jail. And no I haven’t been married before. So a few days past and she started telling my fiancé’s family how I’m married to another man and how bad I’ve been treating her. So I get a call from my mom asking why I pushed my fiancé’s mom and I’m like what? Where did you hear that and she said from my MIL. I started getting calls from my fiancé’s family saying they won’t be able to attend as my MIL is hosting her own event on my wedding day and because of how I’ve been treating her. Some of my family even heard some of her lies cause she called them and word got passed around so even some of my family is backing out and going to her event. One thing she doesn’t know is on my ring doorbell the entire police incident was caught and the guy admitting to her hiring him is on it. She even came over one time and you can see her throwing away my gifts which she told people I returned for money to buy drugs. There’s also texts where she admits she lied about being pushed but it’s because I’m taking her baby away. One guy online said if they take someone’s side before hearing your side, then they already had their mind made up about you from the beginning. Part of me is like fuck those people and my family but then part of me is like maybe I should show everyone the footage and texts. Idk what to do