Quote Originally Posted by huttj509 View Post
The main one I can see popping up unexpectedly is plot hooks. I mean, you're around this person a lot, possibly talking about the campaign, etc. When you get feedback on what's liked and disliked, she's probably going to be a major source of feedback. This can easily lead to more stuff focused around her character just because you hear about her tastes more often.
It also depends on how much you're around the other people. For instance, I'm currently GMing a game for some friends, including an ex. Even back when we were dating, she had no more information about the game than anyone else, because it didn't come up in conversation unless a good chunk of the group was there. Plus, reminiscing about tragic jetpack accidents that occurred in game doesn't exactly yield much useful information.