For inell who wanted Peter/Susan, "serendipity."
Stratagem
"Edmund has the gift of serendipity," Peter told Susan, when she had – as was her custom – come to his room after the rest of Cair Paravel slept.
"How so?" Susan shook out her hair luxuriantly.
Peter paused for a moment to admire her creamy shoulder peeping out from the lace of her night-dress. "He brought forward today a missive pressing the suit of Prince Rabadash of Calormen. You need not accept, naturally, simply show Rabadash favour for a time. That would quiet those who begin to clamour for an heir."
"And prevent any other rumours we might not desire," Susan agreed.
