Not Another Nob by Annabelle Anders

Family rivalries are no match for love.
Neither is who they say they are. He thinks she’s a lady and she thinks he’s a gentleman. Even so, the seeds of romance are planted when they meet over a broken carriage and a small dog.
When they discover each other’s true identities at a mutual acquaintance’s country house party, sparks fly. But with brothers who are arch rivals, does their love stand a chance to blossom?