I liked the first half a lot more than the second
If each story had different pseudonyms, it would've been a lot clearer, but I kinda like the ambiguity/mystery surrounding it
"The paths siblings travel sometimes diverge, imperceptible, often coldly, eventually. ---misunderstandings or exhaustion, dull bickering and a latent acrimony too easily stoked, distances grow. These are the something nothings of relatedness, a thousand strings that crisscross between those who share genes. But some things are not nothings, some things cause the relationship between a brother and a sister to swerve wildly, unexpectedly, pulling one onto the path of the other. Ely traded resentment for a dimensionless kindness the first time Marie-Eve overdosed." (3)