Needing a sleeping companion

Last night Anna and I had Mother Daughter night and Andrew and Alan went out to eat and went to a basketball game. After Anna and I had played with each other's hair, watched the Little Mermaid, read books together, we went to bed. Anna then said, "Mommy, we need two babies. One girl so I can sleep with her and one boy so Andrew has someone." I said, "Really?" She said, "Yes!" I said, "Well you have Rachel when she comes over." Anna said, "I know, but she always has to go home."