Dara,
If you're reading this, the boxes are unpacked and the house behind you is just an address now. I'm writing from the last stretch of it, so let me tell you what you might forget once the mornings turn quiet.
You did not leave in anger. You left because you finally believed what you saw. That took years, and nobody handed it to you. You stayed kind through it: to Leak, to the boys, even to the people who mistook your patience for weakness. Keep that. It was never the soft option. It was the discipline.
Some nights you will miss a sister who exists mostly in the past tense, and maybe never fully existed at all. It costs nothing and it keeps your heart honest. But do not confuse missing with owing. You paid everything that was owed, and then some.
Mom would recognize this house you're in now. That's how you know you chose right.
Build slowly. Love loudly. Answer to no one's weather but your own.