like in oblivion in houses where you get a maid who only gives you certain amount of food beer pie such and such.
something like the skill of you family could be good to
maybe you married a good potion maker and can modify your potion for the right plants
your kid could be maybe born with magic and in time finds out his own new spell and passes it on to you .
Or if the game end up like Fallout NV with the loyalty of groups like NCR
getting in a realtionship with someone improves that factions opinion on you ( it could happen what do you think )