In a viral post shared on the U.K.-based discussion website Mumsnet, user Nolitoad explained they had a dining room drama when her 23-year-old daughter suddenly served a glass of wine to her younger brother while they were at the dinner table.

According to the National Institute on Alcohol Abuse and Alcoholism, 24.6 percent of children between 14 and 15 claimed to have had at least one alcoholic drink in 2019.

It added that young people between 12 and 20 drink 4 percent of all alcohol consumed in the U.S.

The Mumsnet user continued: “I immediately remarked on this and said DS [dear son] is not allowed to drink. She said, ‘really well he is when he is with me.’ DS has sleepovers at her house once or twice per month and has done since she moved out around a year ago.

“When I asked her what she meant it turns out she has been allowing him to drink when he stays over.

“I didn’t want to have a big row with her in front of DS so I just whisked the glass away from him. Later in the evening, I asked her why she had allowed him to do this.

“She told me my approach to alcohol is wrong and she said she wants to introduce him to alcohol in a safe and structured way.

“When I said it’s not her place to decide this, she said the only way my approach is going to end is him drinking in secret in a park. I am really cross with her as he has been staying over at hers since he was 12 and she has been giving him alcohol during this time without mentioning it as she knows I would disagree.

“I know DS is also guilty of this and knows he is not allowed to drink so will deal with him also.”

The Mumsnet user said they messaged the father who claimed to be unaware that this had been happening.

Since being shared on Sunday, the post has attracted various responses.

While some sympathized with the daughter’s position in trying to help her sibling avoid the unpleasant effects of alcohol, the majority said it was not her place to decide when her brother should be introduced to alcohol.

One Mumsnet user said: “Amazing a 12/13-year-old would even enjoy the taste of wine tbh (to be honest).

“Personally, I agree with your DD [dear daughter]—my parents are in France and young teens having (sometimes watered down) wine with a meal is completely normal.

“However, it’s your decision as a parent and now she knows your views on it she should respect that.”

Another added: “It’s not her place to decide and, yes, I’d be cross. We don’t drink much in our house but I do remember growing up allowed a shandy from a young age on a Friday night. Didn’t stop me drinking in the park.”

A third commented: “Eek. Regardless of peoples’ views on introducing alcohol as a young teen, it’s not her choice to make. She’s not the parent, she’s playing the cool older sister role.”

Newsweek was not able to verify the details of the story.