Rinko is aware now that her mother abandoned her, it just didn't got through to her, hope it's just a misunderstanding but clearly it's not.
It's quite rare to see such friendship between Sumire and Rinko, dunno really though, but they both act much more mature than of their age, glad they make up, but Rinko is still pretending and it will hurt her in longer run if she doesn't confess it all although Sumire would most likely tell her situation, which will end her life with Haruno.
Haruno attachment issues are showing up again, it's unthinkable for him deep down, he knows he can't bond like they do...
Thanks for scanlation!