Commencing Our Descent, Suzannah Dunn

Sadie Summerfield wants to be free of him, her Perfect Husband. She wants to be free to dally with a clever, funny stranger, like Edwin, who so readily turns his piercing blue eyes on her (and off his wife). Free to be who she is, free to do as she pleases, free to fall in love. So, she falls. Suddenly and surreptitiously, she is on the threshold of an affair, and finds herself speaking to, thinking of, making plans with, plotting with only him, her would-be lover.

The prospect of the affair takes Sadie and Edwin soaring to new, or old, heights. But, up there beyond the clouds, its altogether too simple to forget that flight is easy, that its landing or take-off which is so very hard.