You shouldn't go into someone's room without their permission.
Jane is playing a game with Liz where they need to hide coins from each other, they aren't allowed in their parents' room.
Jane wants to find a spot Liz won't look in.
Jane throws the coin into her parents' open door, so she doesn't actually go inside.
Jane hides the coin in their parent's room by entering it and putting it behind the dresser.
"Liz lets Jane win this round but then amends the rules to require the coin to be ""placed"", not ""thrown""."
Liz gives up looking for the coin and tells on Jane when she reveals where it is.