My heart twists as I watch my teenagers, Willow and Josh, head off on their first holiday without me. They're spreading their wings, venturing into the world, and I feel a mix of pride and anxiety. Choosing a quiet resort in Bulgaria seems like a safe bet, but I can't shake the worry gnawing at my gut.

Then, like a beacon of hope, I stumble upon Kelly's ad. An English woman of my own age is offering to discretely watch over them for a fee. It's a lifeline, a way to ease my frazzled nerves. So I accept, clinging to the reassurance it offers.

Kelly's updates paint a picture of blissful normalcy. I relax, trusting that my children are safe and sound. Little do I know, they're facing dangers they're too proud to confess.

Then a phone call in the middle of the night shatters the illusion. With desperation fuelling every heartbeat, I drive to the airport, praying it's not too late. As I wait for my plane, I research the woman I hired to watch my children. Panic grips me as I delve into Kelly's past and discover the horrifying truth. There is more to Kelly's offer than I ever could have imagined.

What the hell have I done?

Lorna Dounaeva's books include FRY and Angel Dust. If you're a fan of psychological thrillers like 'Girl on The Train' and 'Gone Girl,' you won't want to miss these thrilling reads. Recommended for fans of K.L Slater, Shari Lapena and Freida McFadden.