That other mother

One spring a few years ago my sister left for a business trip and I offered to stay at the house and take care of my nephew while my bro-in-law was at work. One day I took him to the children's hour at the library and there was a craft table where the kids could make simple paper flowers (I think it was shortly before Mother's Day). C made a flower with the help of the librarian and she said "Good job! Now you can give it to your mom!" He looks at me and says something like "Oh, she not my normal mama, she my sometimes mama when papa away from mama and she come to house and be with papa and me and papa say I listen to her, yes."
Thanks a lot for making me sound like your dad's mistress, kid.