It is rather boring and the wives have little use after marriage, it seems, apart from for holding feasts.
I married my character off to Lady Nadha of Khergit Khanate. Easy enough to get her married to my character, her father wants to marry her off and so long as you're a warrior she's easy to get. I had relationship of '20' when she married my character. I thought, with her being a fighty sort of woman (the bard says she prefers hunting & fighting), that she'd come along with me and fight alongside me (ala 'The Wedding Dance' mod), but no, she sat in the castle.
Took so long just to get the relationship to 20, to just have to ride across Calradia for a single point...that was annoying enough, I'd have hated it if I'd gone for one of the females who requires a high relationship & very high honour/renown.