Rancher's Twins: Mum Needed : Mum Needed (Seasons of the Wicked‪)‬

Nanny Holly O'Mara has formed a close bond with her late cousin's little twins. When their estranged father, rugged Australian cattleman Gray Kidman, arrives to take his children to the Outback Holly senses that he is out of his depth! Holly is already in love with Gray's adorable twins, and she's soon falling for the mysterious man himself.
She can tell Gray is far from indifferent to her, but something is making him push her away...