"I just got a call from a mysterious stranger who said I'm the long-lost prince of a far-off kingdom, and I have to come and claim my throne. Apparently, you're my royal sister. What do you know about this?"
Or, if you'd like something else:
"Hey, I think I just won a million dollars, but I have to share it with you because you're the princess of my heart. Want to meet up and discuss the details?" prank kang service tante princesssbbwpku alias miraindira