'Obnoxious': Woman Ripped for Telling Fiancé She 'Can't Stand' His Sister

Thousands of internet commenters called out one woman who mistakenly told her fiancé just how much she despises his younger sister.

In a viral Reddit post published on r/AmITheA**hole, Redditor u/No_Possession1846 (otherwise referred to as the original poster, or OP) described her future sister-in-law as "the textbook definition of a bubbly blonde," and her desire to keep that cheerfulness far away from her burgeoning bridal party.

Titled, "[Am I the a**hole] for ACCIDENTALLY telling my [fiancé] I hate his sister and she won't be a part of my wedding?" the post has received nearly 10,000 votes and more than 5,000 comments in the last day.

"[My fiancé] and his sister...are VERY close," OP began. "[She] is a good sister to him but as a person, truthfully, I can't stand her."

Lamenting that her fiancé's sister is "overly charismatic, always giggling, and...too immature," the original poster said she knew she didn't want the 21-year-old as a bridesmaid from the moment she was engaged.

When her fiancé asked why, the original poster did not hold back.

"He said he wants his sister to be a part of the most important day of his life," OP wrote. "I can't lie, this set me off.

"I went off about how I want to feel respected by him and be able to enjoy my wedding day," OP continued. "I told him that I have always disliked his sister and wished he would just not include her for once on a day that isn't even about her.

"He got quiet and went into our guest room to be alone [and] a couple of minutes later I got a text from [his sister] that she completely respects my decision to not want her in the wedding party but she's hurt to know what I actually feel about her," OP added.

Whether with a disapproving father-in-law, overbearing mother-in-law or overly competitive brother or sister-in-law, relationships with a partner's loved ones are often difficult and can, in some cases, feel impossible.

And weddings, already a source of stress and contention, only magnify existing issues between soon to be family members.

For brides, choosing the correct supporting cast is an imperative and extremely personal venture. So when it comes to adding a partner's sibling to a bridal party, wedding outlet The Knot suggests considering all parties—and their futures—before making a final decision.

While a close relationship between partners and their in-laws may not yet exist, weddings are just the beginning of a lifetime of family gatherings and excluding a partner's siblings from the wedding party can have repercussions down the line.

If adding a sibling to the wedding party will keep tensions at ease, and doesn't mean the end of the world for the bride or groom, The Bride's Diplomacy Guide author Sharon Naylor recommends including them.

"You don't have to ask her, but for the sake of family harmony it's best to make every effort to include his siblings," Naylor assured.

Woman telling fiancé she hates his sister
Members of Reddit's r/AmITheA**hole forum were quick to call out one woman who said she "can't stand" her future sister-in-law. Liubomyr Vorona/iStock / Getty Images Plus

At the end of her viral Reddit post, however, the original poster noted that his fiancé's sister wasn't upset at being excluded from her bridal party, but rather the original poster's hatred for her and the animosity it comes with.

Throughout the comment section of the viral post, Redditors agreed that the original poster's scathing tirade about her sister-in-law was the main problem and warned what that type of disdain could mean for her relationship moving forward.

"[You're the a**hole]," Redditor u/notlucyintheskye wrote in the post's top comment, which has received nearly 25,000 upvotes. "I have some bad news about what's going to happen if you actually MARRY her brother and legally bind yourself to him and his family.

"You're free to not want her in your wedding party, but if she's going to be your [sister-in-law], you might have to get over your distaste of blondes who've...been bubbly and happy," they added.

Redditor u/ShadyVermin, whose comment has received more than 10,500 upvotes, encouraged the original poster to look in the mirror to understand the hostility she created.

"So... She's happy and enjoying life and this... Bothers you?" they questioned. "[You] might want to do some inward reflections."

"Lots of selfishness on your end, that's not a great way to start a marriage," Redditor u/CrystalQueen3000 chimed in, receiving nearly 8,000 votes. "It's not even like she's major drama, you just find her too giggly and obnoxious."

In a separate comment, which has received more than 4,500 votes, Redditor u/countingpickles said that if the original poster continues to hate her fiancé's sister, it might not bode well for her marriage.

"I suggest you think long and hard if this is the hill you're going to die on, because honestly, you might not enjoy the outcome," they wrote.

Newsweek reached out to u/No_Possession1846 for comment.