This isn't a dating game, get over it.
Go play sims if this if what you care about.
You know I kind of wish people would stop throwing "lol stop getting your sims in my RPG!' in these kind of threads.
It seem somewhat childish and kind of not in the spirit of RPGs (not good ones at least that want their players to invest in the RP part of it) - especially for things that are optional and you don't need to do. Unless just having an option frightens you.
That said I don't want to dress my wife/husband. They are an NPC who should have their own personalty and a style to go with that. They should dress themselves according to that personality. If I could marry a frumpy fish wife/husband in game I would expect them to dress like a frumpy fish wife/husband, or a frumpy fish wife/husband whose station in the world has suddenly changed - they don't have to get round in their work clothes, but they probably shouldn't be looking to comfortable in a tuxedo (unless they are one of those diamonds in the rough types). If I could marry a kick ass warrior I would expect them to probably dress practically at least (think Game of Thrones warrior relaxing). Etc