I thought so too, but I believe the author meant it as a way to say that Derrick never saw Penelope as a sister—he felt no issue liking her because she was never his sister. Obviously it was still wrong since, to the outside world at least, Penelope was Yvonne; Penelope was a “some sort” of sister, so he hid it out of shame. Compared to his actual sister, Yvonne, who he just cares about out of sibling love, blood, and guilt.
what’s with all the incest in these stories, can they have a normal sibling relationship??
I thought so too, but I believe the author meant it as a way to say that Derrick never saw Penelope as a sister—he felt no issue liking her because she was never his sister. Obviously it was still wrong since, to the outside world at least, Penelope was Yvonne; Penelope was a “some sort” of sister, so he hid it out of shame. Compared to his actual sister, Yvonne, who he just cares about out of sibling love, blood, and guilt.