The Currans and The Quinns: The Currans, Book Three (The Manhattan Stories #7)
Donna Foley Mabry

Curran, her adopted son Dan, and her new husband,
Royce Quinn, want nothing more than to raise a family
and live in peace. Their plans are waylaid when the
renegade Jayhawker who killed D’Arcy’s father returns
from prison looking for revenge.
Human treachery isn’t the only thing D’Arcy and Royce
battle on their prairie home. As Dan grows from a boy to
a man and more children arrive, they struggle against
the forces of nature, animals that are not as tame as
expected, and disease.
When Dan meets Kathleen O’Malley, he’s only sixteen but
is convinced she’s the girl for him. He sets out to win her heart, but he wonders, can the pampered daughter of a New York millionaire learn to love a rough-hewn cowboy?