Ride the Lightning by Lex Valentine
Red dragon Emily Carrington found her mate in black dragon Vahid Delrey, but misunderstandings, painful secrets, and distrust keep them apart. Emily thinks Vahid doesn't want her. Vahid thinks Emily is a stuck up snob who could never truly love him. Both dragons hide crippling secrets from their pasts as their pain at being apart escalates. Emily falls for the strong, sexy black dragon and hides her need of him behind an icy facade. Vahid longs for Emily to need him but can't bring himself to mate with such a cold woman. When Emily's secret pain fetish threatens her life, Vahid must decide whether to save her or let her self-destructive ways rid him of the mate he never thought he'd love.