The Half-Orc’s Maiden Bride (Aspect and Anchor, #3.5)

Lady Iolanthe of Rockmourn Keep expects to be a spinster all her days. She is very tall. She is very poor. And she is thirty. What lord could possibly want her?

But then her father returns with news that he has found a bridegroom for her - one that is impressively tall. One that is strong, and bold, and wealthy. And best of all? He wants Iolanthe. It seems too good to be true.

And when Iolanthe gets her first look at her husband-to-be, she realizes why.

No one mentioned the 'orc' part of things...