Time of the King by Ivy Hollins

A powerful warrior king. A lonely single mother. And a plot that might pull them apart – or bring them together.

When Bethany Edmondson finally escapes her abusive ex-husband, she is determined to go somewhere he will never find her. With the help of a stolen time machine, she whisks her son away to the past. But medieval Scotland is a dangerous place, and only lies will help her to survive.
Comgall is already angry at his arranged marriage. When a mysterious woman appears, claiming to be his fiancee, he hardly knows what to think. Something feels wrong – but, despite himself, he is more and more drawn to his mysterious betrothed.
The more Bethany tries to escape Comgall, the more she finds herselif tied to him. Can the past really offer her freedom – or will her own history catch up with her?