Yes/No Mixed answer haha.
I completed the challenge and had it happen once but... the reason it happened was because my game bugged out and went all glitchy and kept freezing and my sim could not take care of the kids needs... about 20 minutes later it bugged out so much that my computer froze and I lost all progress I had made, so I got the kid back as I had to go back a save. Unfortunately I also "lost" a diff kid that way, not through being taken away yet but it just ended up never being born. When the pregnancy completed the second time it was twins instead of one haha...