From Runaway to Pregnant Bride

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.
Carrying her rescuer's baby! 

Annabel Fairfax fled West in disguise to find her sisters. But on her way a threat catches up with her—and she's forced to turn to a ruggedly handsome stranger on horseback! 

Clay Collier, her reluctant protector, tries to keep his distance from the beautiful runaway—but neither can resist one stolen night! Honor demands he marry her, but discovering Annabel's affluent background convinces Clay she doesn't belong in his dangerous world. Except his forbidden bride is already secretly pregnant…