It's always hard when family members have to go at each other's throat. We found another drama like that from the glorified r/AmIthe*sshole.
In this situation, OP (16F) has three younger siblings, twin brothers, and one sister, all under 10. She frequently gets asked by her parents to watch them when they need to go out, but recently, it has become more problematic.
The parents take extended periods to return, often coinciding with times when OP has plans with friends. Additionally, when in the house, the parents tend to shift all the responsibility onto OP, even when it interferes with her plans or activities.
On the night of her friend's birthday celebration, OP's parents inform her that they are going out for drinks and need her to watch the siblings. Frustrated and having made plans for weeks, OP confronts her parents, expressing her frustration with always being the babysitter and feeling neglected when they are in the house.
Despite explaining her prior plans for a special occasion, her parents call her selfish, emphasizing that it's a one-time request and they rarely get to do things like this.