That would explain how it lasted so long. It's very thin, too... (she says, making excuses).
I give you the last few paragraphs...
Julian looked down at her and there was an ardor that was close to worship in his eyes...
[hero's sister - why does she have to be part of the final scene??? - says] "As long as you make Julian happy, Robin, you are my friend. That's all I want. [isn't it romantic, to be being Told by the hero's sister? and excuse I, but why can't Robin be happy too??? Doesn't Julian have ANY responsibility for that??]
Robin said, her voice not quite steady, "It's all I want too, Steve."
Julian looked contentedly at his two women folk. [womenfolk?]
He dropped an arm about each of them and said tenderly, "And now let's go home, shall we?"
"Home!" Robin repeated in a tone that wrapped in the single word all the yearning and hope and eagerness with which she faced her new life as Mrs Julian Gilbert, of Hibiscus Cay in the Caribbean.
[MRS JULIAN GILBERT???]
Ye gods and little fishes. It's culled. Decidedly. Last borrowed in 1987. Oh, and published in 1962, in case you wondered. And it was, originally, a donation (as one devoutly hopes, although one also devoutly wondered why it was accessioned At All).
And while you're snorting at that one, it's a chance to slip in this gem to amuse you. We don't have this one in the library (or at least, I haven't found it and severely doubt it is in the library collection. I could always check the catalogue) but thanks to the blessings of the internet and blogs like Judge a Book by its Cover, (source of image below) all you need is a screen, and the ability to count, to enjoy this:
Hint: count the heroine's hands..... (The additionally amusing thing to know is that this book sold Extremely Well because of its notorious cover...!).
Clearly, things are getting nutty around here. Time for a holiday! See you in a fortnight!