The Godmothers by Monica McInerney

Eliza Miller grew up in Australia as the only daughter of a troubled young mother, but with the constant support of two watchful godmothers, Olivia and Maxie. Despite her tricky childhood, she always felt loved and secure. Until just before her 18th birthday, a tragic event changed her life.
Thirteen years on, Eliza is deliberately living as safely as possible, avoiding close relationships and devoting herself to her job. Out of the blue, an enticing invitation from her godmothers prompts a leap into the unknown.
Within a fortnight, Eliza finds herself in the middle of a complicated family in Edinburgh. There's no such thing as an ordinary day anymore. Yet, amidst the chaos, Eliza begins to blossom. She finds herself hopeful about the future and ready to explore her past, including the biggest mystery of all - who is her father?
Set in Australia, Scotland, Ireland and England, The Godmothers is a story about love, loss, hope and sorrow, the families we are born into and the families we make for ourselves.