How do I kill my baby sim, in sims 3?

I had 2 sims woohoo, but instead they had a baby... so now i have a baby that I don't want. I have 8 sims in this family now so I need that baby gone. I put it in a crib outside and just ignored it... But the stinkin' social worker came and took all 5 children away. That happened twice! So I need another way to get rid of it. Right now I'm sick and I've been playing sims all day today and all day yesterday and that baby is driving me insane. Also, please no one freak out about this... everyone kills there sims. :)