Roberts, Nora: MacGregors: Serena-Caine, The (The MacGregors #1-2)

Playing the Odds (1985)
When fiery heiress Serena MacGregor ups the ante on cool Comanche gambler Justin Blade, steamy doesn't begin to describe the results.

Tempting Fate (1985)
Attorney Caine MacGregor rarely met a case - or a woman - he couldn't win. But can he overrule ice princess Diana Blade's adamant objections to love?