GigiThePug

Riddle time!

So, there is a circle house where a family of three live. They are rich so they obviously have a butler, cook, and maid. The father and mother went out on a date for their anniversary. They left their 2 year old baby at home. When they came back the found the baby dead, so they questioned the butler, cook, and maid. The butler said he was taking a nap, the cook said he was cooking, and the maid said she was cleaning the corners. Who killed the baby?