We're hugging and talking about how great our family is when Calliope mentions a daddy.
Me: do you wish we had a daddy?
Me: why do you wish we had a daddy? what do you wish he would do?
Calliope: He would lift me up so I could climb tall trees.
Me: Oh, I see. But where would he sleep? You've been sharing my bed my bed recently.
Calliope: He could sleep in your bed and I could sleep on his belly.
Me: Oh, okay. And if we had another Mommy?
Calliope: That's fine, she could sleep on YOUR belly!
My attempts to avoid assuming heterosexuality apparently translated into an openness to polyamory.