Husbands & Lovers by Beatriz Williams

Single mother Mallory Dunne never thought mushrooms would be her worst nightmare.

When her ten-year-old son, Sam ingests a poisonous death cap at summer camp, his life hangs in the balance.

Sam survives, but his kidneys are permanently damaged and dialysis and the transplant list are his only options.

Mallory doesn’t have a lot of living family, besides her sister and has never told Sam’s dad about him.

That’s because Sam’s dad is world-famous musician Monk Adams and their brief summer fling ended mysteriously.

Mallory’s sister Paige is determined to find more relatives to test for possible kidney donation and discovers that their mother was adopted.

This leads to a mystery set in Cairo, Egypt during the 1950’s.

Hannah Ainsworth is married to a much older British diplomat.

Her one desire is to have a child, so she begins an affair with the hotel concierge.

Danger surrounds Hannah as the Egyptians revolt in Cairo and she discovers her lover is a spy.

Courtesy of Penguin Random House