Responses
why does everyone think she's newborn?
transmigration doesn't really have set rules on when it happens, she could have transmigrated into a baby that was already there for a while. Dad was clearly rushing back from something, but what if he was traveling a great distance? He might have gone somewhere for urgent demon lord business/got delayed on his way back only to hear that his wife had fallen ill and rushed back to see her.
Think of all the soldier reuniting with baby videos.

I'm sorry but I'm really bothered that a newborn baby has teeth. She's a newborn baby, right???( ̄∇ ̄")