"I bite Isabelle"

Everyday when we get home from picking up Paige from daycare we usually ask her how her day was. Usually she'll respond with an "Oh-tay" or some other quick non-descriptive answer of what she did. The other day was different. I asked her what she did at school that day and she responded "I bite Isabelle". Isabelle is a few months younger than she is and she always talks favorably about her. She calls Isabelle her friend. So we were a bit shocked when she told us she bit her. Just shocked in general because she's been over the biting phase for a long time now. So we started asking her more questions and she was either getting confused or just decided to start playing with us. We asked her why she would bite Isabelle. She then said that Isabelle bit her. The more questions we asked the more her story would change. So the next morning, I debated about saying something to her teacher but then finally did. I would want to know if she's biting and also how they are handling it. Her teacher just laughed at me. She said she couldn't even picture Paige attempting to bite someone! That made me feel pretty good. Fast forward to this morning, I was dropping Paige off and putting her slippers on (they cleaned the carpet and so the kids all wear slippers during the day. Paige calls them her "pippers"). I looked over at Isabelle playing with another little girl and I heard the other little girl yell at Isabelle. Then the teacher turned quickly and said "Isabelle, no biting". It must be Isabelle going through the biting stage. I really hope she doesn't get Paige doing it again. I'm very happy to be past that stage.