Cowgirl In Pearls

Description for COWGIRL IN PEARLS by Jenna McKnight:

The Cowboy Catch

Cook? Drive cattle? Share a bathroom? Princess Moira hadn't counted on any of it when she'd changed places with Chloe Marshall and found a job on Dutch Cordwin's dude ranch. She also hadn't counted on Dutch. The cowboy had a way with kids and critters, and a look in his eyes that left Moira breathless. As a princess, Moira wouldn't have had a chance with Dutch, but as Chloe, she could follow her heart. This was freedom!

Then Dutch's twin girls decided "Chloe" wasn't quite who she claimed...

Harlequin American Romance #724, April, 1998.