relationship options in game design

As soon as you try to give the player options, things are going to go wrong, because SOMEONE will want an option you haven't programmed in, and SOMEONE will be annoyed by the options you did program in. :) Which isn't to say that you shouldn't try, just that you should expect that somebody's going to complain no matter what you do.

Interesting thread involving Fable 2 here - about the difficulty of trying to obtain children for your lesbians.