"개구리가 아기의 침실에 들어가요."
Translation:The frog goes into the baby's bedroom.
안방 typically refers to the master bedroom or the parent's room. I would have said 아기의 방에 들어가요
If they gave the master bedroom to the baby then parents' bedroom is referred to 안방. The meaning of 안방 is 안주인이 거처하는 방 = the lady of the house's room.
Living in Korea I've mostly heard 안방 as bedroom. Is there a reason 침실 is used here?