The opening of this story does a great job of setting the mood and atmosphere, getting the reader hooked right away. Some of the details of the family's behaviour would be very relatable to readers, so writing in the second person was a good choice.
However, the dialogue and emotions of the protagonist could be elaborated upon more - for example, we don't get a sense of what makes this particular situation so awkward and shameful. Furthermore, establishing the protagonist's feelings towards their siblings and why they are disappointed with them would add layers to the story and make the emotion more believable and relatable.
Overall, with some more development around these key areas, this story could become much more powerful.