I've done a horrible, horrible thing to one of my PCs and impregnated her with the spawn of a Lesser Other God (one found in the London chapter of Masks). The player is very cool with it and willing to run with whatever I throw her way, so...
What now? Obviously there will be horrible dreams and her reality will start to bend as the star spawn slowly begins to affect her body and mind. But the descriptions of Lesser Other Gods are fairly vague, and since no one in the party actually saw the ceremony, I can pick whatever God I want.
Aside from those dreams, I need some suggestions to help drive her into oblivion. Since she's the 'bedrock' of the group and has only lost 2 sanity upon the realization that something is growing inside of her and no one knows where it came from, I'm not for just sending her straight over the edge - a slow descent to total madness would be best.
Also, how long should incubation be? I'm thinking either something very short or very long. Unless we think she should essentially determine the timeframe herself, how she reacts to the spawn could determine whether it comes out sooner or later.
Well, now I'm just brainstorming, and that's your job! Throw me your sickness and help make this pregnancy one to remember.