Dragon actually - G.A. Aiken

It's not always
easy being a female warrior with a nickname like Annwyl the Bloody. Men tend
to either cower in fear-a lot-or else salute. It's true that Annwyl has a
knack for decapitating legions of her ruthless brother's soldiers without
pausing for breath. But just once it would be nice to be able to really talk
to a man, the way she can talk to Fearghus the Destroyer.

Too bad that Fearghus is a dragon, of the large, scaly, and deadly type.
With him, Annwyl feels safe-a far cry from the feelings aroused by the
hard-bodied, arrogant knight Fearghus has arranged to help train her for
battle. With her days spent fighting a man who fills her with fierce, heady
desire, and her nights spent in the company of a magical creature who could
smite a village just by exhaling, Annwyl is sure life couldn't get any
stranger.

She's wrong .
.
.

And just wait until you meet the rest of the family.