AITA for not wanting to ask friends to stop drinking at a party we hosted when my husband’s sister surprisingly arrived?

The backyard hums with laughter, clinking beer bottles, and the sizzle of burgers on the grill, as a couple hosts a 4th of July bash to welcome home a military friend and celebrate his 30th birthday. Friends who trekked hours—or even flew across states—fill the night with joy. But the festive vibe takes a sharp turn when the husband’s sister, fresh in her sobriety journey, shows up uninvited, her eyes wide with dismay at the alcohol-fueled merriment.

Her request to halt the drinking throws the hosts into a bind: honor her needs or respect the party’s purpose? It’s a story of clashing expectations, where the glow of celebration meets the raw reality of recovery, forcing a tough call about loyalty, boundaries, and the weight of uninvited surprises.

‘AITA for not wanting to ask friends to stop drinking at a party we hosted when my husband’s sister surprisingly arrived?’

My husband's sister has been struggling with alcohol, and in mid-June she had a wake-up call and started in AA. She hopes to eventually be able to be 'around' alcohol again, but for now feels like it would be too triggering, so she has asked us not to drink alcohol around her.

The 4th of July was this past weekend, and we had something extra special to celebrate: a long-time friend of ours returned home after being overseas in the military, and on top of that celebrated his 30th birthday on the 5th.

My husband and I usually have some friends over for the 4th, so we decided to make it a combo celebration of the 4th/friend's homecoming and birthday. With the special celebration, some extra friends who have moved away even came for the celebration, some driving several hours and a couple people flying in from other states, so we were pretty pumped for this.

Disclaimer, we've hosted gatherings with this group before and while they typically involve some definite alcohol consumption, our group is not too rowdy and everyone crashes at our place after (no one drives home). I'm not talking about a rager of high school kids, just a bunch of adults of drinking age.

Anyway, on the 4th while our gathering was well under-way, at about 9PM my husband's sister arrived. To be frank, we did not invite her to this party because we *knew* there would be drinking and she had asked us not to drink around her.

But my husband had mentioned the gathering to his parents (he borrowed some coolers) and they apparently told her we were 'having people over.' She said she felt bored on the 4th because all her regular friends were drinking, so she decided to come over to our place.

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Upon arriving she was upset by the drinking, and asked us to ask everyone to stop drinking. Two problems: (1) she didn't want anyone to know why (she wanted us to come up with an excuse) and (2) everyone had already had a few drinks.

We live out in the country so those who prefer to keep partying can't just walk to a bar; they're pretty much stranded at our house until they can drive. Since we invited them to our home specifically for this celebration, I didn't feel comfortable just asking everyone to drop the beer - especially since, again, we didn't actually invite my husband's sister - she showed up uninvited.

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Under other circumstances I would have no issue with that, the more the merrier, but I wasn't comfortable with it when it means crashing a party in a friend's honor and asking us to get everyone to stop drinking but not be allowed to tell them why.

(If we could tell them why most of our friends would probably be willing to oblige, but it's pretty hard to justify that request without stating a reason or raising more questions). Husband's sister ended up leaving in tears saying that we don't support her journey, and went to her parents' place (who are now upset with us also).. Am I (are we?) assholes for this?

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Throwing a party is all about creating a vibe, but an uninvited guest demanding a mid-event pivot can douse the spark faster than a summer storm. The couple’s refusal to stop the drinking, while tough on the sister-in-law, reflects the reality of hosting a planned event for guests who’ve gone all out to attend. Her sobriety is a serious journey, but showing up unannounced and expecting the party to bend to her needs tips the scales toward entitlement.

Dr. Anna Lembke, an addiction specialist, notes, “Early sobriety often requires avoiding triggering environments, as the risk of relapse is highest in the first year” (Stanford Medicine). A 2021 study in the Journal of Substance Abuse Treatment found that 65% of recovering alcoholics report social settings with alcohol as a major trigger (ScienceDirect). The sister-in-law’s decision to crash a known drinking event, rather than seeking an AA meeting, was a risky move that put her recovery at stake.

The broader issue is managing personal recovery in social contexts. The couple’s hesitation to enforce her request without explanation was practical—guests would likely question a sudden ban. Dr. Lembke suggests proactive communication: “If you need a sober environment, discuss it with hosts beforehand.” The sister-in-law could benefit from planning ahead, like attending recovery-focused events during holidays. For the couple, a gentle follow-up conversation affirming support while setting boundaries—like requesting advance notice—could rebuild trust and clarify expectations.

Let’s dive into the reactions from Reddit:

The Reddit posse brought their A-game, serving up a mix of empathy and no-nonsense takes on this party-crashing drama. They rallied behind the hosts’ tough call, with a side of shade for the sister-in-law’s bold move. Here’s the raw scoop from the online crowd:

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missmyrajv − NTA: Members of the AA fellowship are always active on holidays, meetings, get togethers, etc. That would have been the wise option for her to choose if she was bored, not crashing a party that she wasn’t invited to, wasn’t positive if there’d be alcohol or not, and then asking everyone at said party to change their plans for her.

[Reddit User] − Absolutely NTA. Like you said, you didn’t invite her for that very reason. It’s honestly a little ridiculous she would even ask that. Even generally speaking, I think it’s a little silly to ask everyone to abstain from drinking just bc she’s in AA, but in this case, you did absolutely nothing wrong.

vandajoy − NTA - she came to a party she wasn’t invited to and demanded it change. Her sobriety is her responsibility

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[Reddit User] − NTA. She has no right to ask others to stop drinking. This isnt her party. Her a**oholism is something *she* has to deal with.

Purple-Ad-4187 − NTA. The entitlement here is insane.

MistressOfNecropolis − NTA. Your in-laws are being absurd. Your husband needs to tell his parents that it isn't their place to tell anyone about gatherings you are having. You didn't invite her for a reason. They massively over stepped, and rather than take responsibility for that, they are getting mad at y'all for not accommodating the situation they created.

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They need a reality / boundary check from him STAT. Your sis-in-law showed up uninvited and unannounced. She didn't even call first to see what the event was and check if she could stop by. She also had a big misconception about how this sobriety journey works.

She can make the choice to remove herself from situations with alcohol until she is further along and more confident in her ability to say no. But she does not get to force the world around her to stop because she did. She should have gone to a meeting or to her parents' house or something.

Your husband needs to address this with her 'while you're in the beginnings of sobriety, you need to give us advanced notice if you'll be coming over. If you want us to accommodate your need to not be around alcohol, you can't show up with no notice and expect everything to change.'

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Cuz here's the thing - even if you weren't having a party, just a romantic evening in with wine, she would STILL have been out of line to show up unannounced and demand you change your plans to accommodate her. Utterly out of line.. Your hubs needs to be having some frank convos with his family.

[Reddit User] − NTA she wasn't invited for a reason. She can't make up rules as she comes plus her parents shouldn't have mentioned anything to her.

NAQURATOR − NTA, how is this even a question? Showing up to a party uninvited and then demanding people to not do something they expect to do at said party is just stupid imo. your husbands sister sounds very egocentrical and that's her problem, not yours.

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jmiracle23 − NTA, and this is the behavior of someone who is setting up a relapse (subconsciously) because 'no one supports her' and 'everyone around her gets to drink.' She should have gone to a meeting instead of a party with booze if she was having trouble with the holiday sober

claudiarabbit123 − Nta. People drink at parties. Not sure what she expected to find when she randomly showed up at a 4th of July party. She needs to speak to the hosts before hand, not expect everyone to change midparty.

Redditors cheered the couple’s stance, pointing out the sister-in-law’s misstep in expecting a tailored environment without warning. Some flagged her parents’ role in stirring the pot, while others urged her to own her sobriety choices. But do these spicy opinions capture the whole vibe, or are they just adding fuel to the fire?

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This 4th of July fiasco shows how quickly a celebration can turn into a test of loyalty and boundaries. The couple’s choice to prioritize their guests over an uninvited demand wasn’t easy, especially with family feelings on the line. It’s a reminder that supporting someone’s recovery doesn’t mean rewriting your plans on the spot. Have you ever faced a surprise guest who flipped the script at your event? How did you handle it? Share your stories below!

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