Don't negotiate with terrorists, ever.

If you give in to her unicorn demands, then the princess has a unicorn to help her lock your friend in the bathroom.

Adult vs 7yr old? Win goes to adult.

Unicorn and 7yr old vs adult? Win goes to unicorn and master.

Besides, you're a Marxist. As such you have no objections to "pretty," but asking a Marxist to concede to the authority of a monarch is a bit much.

OTOH, it IS her kingdom to rule as she sees fit. If it happens to extend to the other end of the phone line, then that's your fault for having moved to a magic kingdom without reading the renters' agreement clauses about the rights of pretty princesses and the obligations of peasant stable-boys.

You could have told her to take it up with Santa, since he's got this year's supply of unicorns. "Call again during foaling season."

Now GC insiders realize that she was calling the wrong guy. She should've gone directly to the source and called Unico.

Dante