Spoiler text.@Ncccxs 
Yes, they do ultimately end up together, however it really took years for him to even find her and their daughter, let alone forgiveness. Everything he did to her because of his own misunderstanding AND stupidity even though he's very smart.  He thought she played a part in luring his father before he was tortured and killed, EVEN though she was a just a little girl at the time (11 or 13 only) and it's one of the things he beats himself over, how could he assume a little girl was capable of that. When he finds them, he is constantly groveling and begging for her forgiveness and to give him a chance, but she really really treats him like a dog (without the leash though).  In general, the regret nearly kills him him, heck even her brother keeps wondering "grace, what did you do to make such a demon so obsessed with you".