This is funny cause it happened to my Sim characters. I drowned my sims by making them swim and the removing the ladder so they could get out of the pool. I also had the nude patch so I would remove the bed just to see what mysteries lie under those sheets when the Sims "woohoo"
I like it when they pee.
Na, trap them in the basement and let em starve. That way they don't even find the kids. :)