Relative to Who
Smith and Smith. No relation. Maybe. (prompt 'admission')
. . .
"I'm Doctor Smith. This is my assistant, Sarah-Jane."
"Sorry, sir. Only relatives admitted."
"Oh, but I am!" she put in, ignoring the Doctor's look. "We're both Smiths."
The guard looked skeptical. "Not your wife?"
"My niece," the Doctor tried, "who also works as my assistant."
"Nepotism, eh?"
"I beg your pardon!" The Doctor protested huffily.
Sarah-Jane pulled him away. "Let's try the other door."
"Good day, sir. I'm Doctor Smith and this is my assis…niece."
"Your what?"
"His daughter," said Sarah-Jane. "Assiznice Smith. It's French."
The Doctor nudged her past. "Yes," he added dryly. "The English translation is Sarah-Jane."
"Relatively, yes!" she grinned.
.