Cate Corrals a Cattleman - Brides with Grit, #6

A clean, sweet historical romance set in 1873. Widowed ranch woman Cate Wilerson's four children are now all married and she's enjoying being a grandma. But, she's only in her forties, so she could be married again for many years. Cate's ready to tie the knot again and she has already picked her groom. Cattleman Isaac Connely bought a ring for Cate almost thirty years ago, but Moses Wilerson, a friend to both of them, asked Cate to marry him first.
After serving in the Civil War, Isaac followed the Wilersons to Kansas and builds a cattle empire with his inheritance. He respected Cate's and Moses' marriage, comforted her through the loss of her husband and remained a friend of the Wilerson family. Now he's ready to propose-with the same ring-but someone from his past appears on his doorstep, dredging up a dark secret making him doubt his worth to be Cate's husband.
Can Cate let go of past hurts and help Isaac realize he is not to blame, so he will finally ask her to marry him?