AITAH for telling my sister I’ll report her to the police if she files a false a**ault claim?

The birthday cake glowed under fairy lights, but Jane’s stomach churned as her sister’s laughter turned sharp, zeroing in on their young nephew-in-law. What started as a family celebration spiraled into chaos when Jane’s 41-year-old sister, drunk and flirty, crossed lines with the 23-year-old, leaving him squirming. Jane thought escorting her home would douse the fire, but now a darker storm brews—lies that could shatter lives.

When her sister spun a tale of assault, pointing fingers at the innocent nephew, Jane’s blood boiled. Readers might feel that jolt of betrayal, picturing a family torn by one reckless lie. For those who want to read the previous part: . This update dives into Jane’s fight to shield truth from a sister’s dangerous fiction—can she save her nephew without losing her family?

‘AITAH for telling my sister I’ll report her to the police if she files a false a**ault claim?’

This past Saturday, we had a birthday party for one of my siblings. It was supposed to be a pretty decent night, but things took a turn because of my 41-year-old sister. She had too much to drink and started acting inappropriately toward my 23-year-old nephew-in-law, (my other sister’s son-in-law).

At first, it was just little things—standing too close, laughing a little too hard at his jokes—but then other people started noticing her brushing up against him, touching his arm, and being way too flirty. At one point she was following him around and he clearly was being nice by just figuring out another way to walk away.

I’ve heard my 41yo sis make weird comments about him before, stuff that always made me uncomfortable, but I never thought she’d actually cross a line. My nephew in law is 23, he is muscular and tall. My niece is 22 and they love each other very much.

My nephew in law was clearly uncomfortable and did his best to avoid her, he finally went up to his mother in law (my other sister) and told her that he wasn’t trying to cause a scene but my 41 yr old sister kept squeezing his arms and telling him how handsome he is.

My other sister got very upset and tried to talk to my already drunk sister but it didn’t go well at all. My 41 yo sister was trying to play it off like he was making it up. BUT we all saw it. My niece (his wife) was devastated, and my other sister was pissed.

To keep things as peaceful as possible, I told my 41 yo sister she needed to leave, and I had a friend take her home. She wasn’t happy about it, but I thought that was the end of it. Fast forward to today—she has been telling family members who weren’t at the party that my nephew in law came on to *her* and even attempted to s**ually a**ault her.

She’s now saying she plans to file a police report. I was surprised and told her straight up that if she does, I’ll report her for filing a false claim because I know she’s lying. Now, she’s playing the victim and saying I’m a terrible sibling for not defending her.

Some family members believe her bc my nephew in law in their words is “young dumb and full of …”, while others know she’s lying bc they have heard her be inappropriate plenty of times with other young guys, but now I’m the one caught in the middle.

I don’t want to make things worse, but I also can’t just let her ruin someone’s life, his and my nieces, because she got embarrassed. I told her she better let last night go bc if she goes through with this, I will have to report her. So -AITAH for telling her I’ll report her if she files a false police report against my nephew in law?. So I got a call from my sister asking me if everyone was ok.

I told her no and honestly was confused as to why she asked me that…she should know we are not. She told me she is still thinking abt pursuing this bc in her words “her name is being dragged in the mud but it really should be my nephew in law”…her friends and coworkers are encouraging her to “not be bullied, shamed or silenced”.

She said she really wants us all to know she would never do anything to hurt anyone, and if filing the police report and going as far as pressing charges will prove that, then that’s what she will do.I ended up telling her if she went through with this we will take legal action for my NIL and as far as the family, we will seriously cut communication with her bc this is wrong.

She then asked me if I was ok with her going to jail to clear my NILs name…I told her yes bc you know he didn’t do anything, you did…and then disconnected the call. I think she wanted me to say I believed her, I have no clue. So to prepare, I have called a few attorneys to set up consultations for my nephew.

I’m waiting to hear back. His parents are now involved as well and want to also assist their son with seeking counsel. I have communicated to them that we know their son didn’t do anything. They live in a different state and are very worried, but thankfully they still trust me and his mother in law(my other sister) for now.. SMH FML………why…

Family parties shouldn’t end in police threats, but Jane’s sister is rewriting the script. Her false assault claim against her nephew-in-law isn’t just a lie—it’s a wrecking ball aimed at his life, marriage, and reputation. Jane’s stand to report the truth pits loyalty against justice, with her sister’s denial fanning the flames. It’s a high-stakes clash where silence isn’t an option.

Legal scholar Deborah Tuerkheimer, in a 2023 The Atlantic article, warns, “False allegations, though rare, can devastate—swift action and evidence are critical.” A 2022 Journal of Criminology study notes only 2-6% of assault reports are demonstrably false, but their impact is catastrophic. Jane’s eyewitness account and partygoers’ support are her nephew’s shield.

Jane’s right to draw a hard line—her sister’s behavior was predatory, not playful. Tuerkheimer advises documenting incidents and securing legal counsel, as Jane’s doing. She could urge her sister for a public retraction to defuse harm. Readers, ever faced a family lie this big? How’d you hold the truth steady?

Heres what people had to say to OP:

Reddit’s crew stormed Jane’s saga like it’s a courtroom drama, slinging cheers, fury, and a few choice burns. It’s like a late-night diner debate where everyone’s got a stake in justice. Here’s the unfiltered buzz, packed with grit and heart:

loralie-larni − It’s tough being in the middle of family drama, but ultimately, you’re standing up for what’s right.

bcastgrrl − NTA. If she files a false report, that's against the law and can be thrown in jail, so your are NTA. At all.

Sweet_Pay1971 − Your sister is trying to ruin this kid life

New-Number-7810 − NTA. Contact a lawyer and ask them what you can do to help your nephew.

Ok-Reply9552 − Nta. This is a sign to limit or go no contact with her and for your niece and nil to cut her off completely. And anyone who sides with her bc he could get in serious trouble. I’d honestly start documenting what happened and getting statements from ppl who were there about what happened. And try and get her in text or on a recording saying that she’d file a fake report.

FreeAttempt7769 − Good for you. Your sister is a S**UAL PREDATOR.

[Reddit User] − This isn’t family drama, this is a crime your sister is committing and she could ruin someones life you need to inform your nieces mother what your sister has been telling people so she can take the appropriate steps to protect her family.

Your sister s**ually harassing a 23 year old married to her niece is disgusting and then trying to cry rape is crazy. Your family members siding with her are dumb and nuts!! There are more than enough witnesses that your sister should be ashamed of herself.

Free_Thinker_Now627 − NTA and your sister is about to drop a bomb and destroy your family forever. She is a major AH

OkStrength5245 − It is not enough.. Demand that she tell everybody that the guy never did anything.. If she doesn't , make it public. It is defending abuse victims, all of them, to shame false claim.

Perfect_Ring3489 − Stand up for your nephew. This could ruin his life. Nta

These Redditors are fired up, hailing Jane’s backbone or blasting her sister’s gall. Some push for legal lock-and-key; others fear family fallout. But do their loud takes catch the full weight, or are they just riding the outrage? One thing’s clear—Jane’s stand for her nephew has everyone talking. What’s your vibe on her bold move?

Jane’s story is a heart-wrenching clash of truth and lies, where a sister’s drunken misstep could ruin a young man’s life. Vowing to report the false claim, Jane’s choosing justice over family ties, but the cost looms large. Can she protect her nephew and niece without torching what’s left of kin? If a loved one spun a lie this vicious, how’d you fight back? Share your thoughts below—let’s unravel this twisted tale!

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