Those last 4 pages feel more like a follow up to chapter 1, before the author decided to do the other 9 chapters. And if you look at it, the head of the bed on the last page of chapter 10 is different than the one on the 1st of the 4 extra pages.
"You're okay, even if we're both girls?"
Why the hell she said that?! That doesn't make sense after what was established in the first chapter.
She should say something like:
"You're okay, even if we're sisters and I'm 10 years older than you?!"
This was absolutely the cutest chapter, in a story that does not lack in cuteness. They were simply adorable. And the ending was perfectly timed, it is all basically set in one evening when they reconnected, and interposed with reminiscing that provided the backstory.
Wish the story was about how they fall in love after meeting at the dating site rather than already being in love with each other. Nevertheless really good story.