A Fair Affair by Sara Madderson

Noah’s #1 celebrity crush since med school is Honor Chapman, one half of the UK’s most famous power-couple. When she moves her mother into his hospice, Noah gets to know the real Honor. And she’s spectacular. His vocation is helping the dying go peacefully. But his new obsession is bringing this woman back to life.
Honor’s on the brink. Her movie-star husband is cheating (again) and her mum is dying (for the first time, admittedly). They’ve built an empire from their family’s brand, but their gilded life feels more like a gilded cage. So, when delicious doctor Noah propositions her by a moonlit pool, she is there for it. His bedside manner has nothing on his poolside manner, and she deserves some extra-marital steam. It’s only fair!
It’s supposed to be a sexy little fling. It’s not supposed to jeopardise everything Honor has built. But as professional pressures mount and the paps circle, she and Noah must decide what’s worth fighting for.