Did You Want Bonehilda Back?

So... she is in my game. I didn't see her directly, but when I was out at a community lot I ran into a male Sim whose last name was Skeleton. When I used MCCC to click on him it showed that his spouse is Bonehilda. I was confused because I never played TS3 (guessing that is where she came from) and I didn't get the reference. Do you think they already snuck these characters into the last update? They don't show up in neighborhood families and I haven't tried checking in hidden families yet.