The original poster has been a rock for her sister, offering immense support during a difficult time. However, her sister started taking advantage, turning helpful gestures into expectations. The original poster is not obligated to sacrifice her own life and well-being for her sister's choices. It's not about abandoning the nephew but setting healthy boundaries.
The original poster's sudden boundary-setting seems convenient after enjoying the initial praise for her support. Her resentment is palpable, and while boundaries are important, her harsh words to her sister reveal a lack of empathy. The nephew is innocent, and her actions risk causing him emotional harm. She is prioritizing her convenience over her family's needs.
While the original poster initially showed commendable support, her sister's increasing reliance became unreasonable. Setting boundaries is necessary, but the harshness of her words and the timing are questionable. Both parties bear responsibility for the strained relationship. The sister is guilty of exploiting her sister's generosity, and the original poster is guilty of expressing herself insensitively.