Since the mass exodus of former SHIELD agents, most of them had taken refuge at Avengers Tower. Tony had the resources to conduct thorough background searches on any and all who came to him, and plenty of vacancies after going back through his own employees' files with a fine-toothed comb.
Of course, this had also resulted in having his own floor of medical staff, who insisted on running full blood panels on new residents and/or employees, with the assurance that all blood samples would be destroyed after testing for trace amounts of metals that often indicated nano-tracking devices. Jarvis kept a watchful eye to make sure this was done.
When Tony had hired/adopted Lily, she had been no exception to the rule. Still, he was confused when the results popped up on one of the holo-displays in his workshop. "Uh, Jay? What's this doing here?"
"Upon reviewing Miss Morgan's results, I thought you might find them rather interesting. You will note that I have taken the liberty of displaying your own DNA alongside that of both the young woman and her mother."
"Jarvis, what the hell are you on about?" Tony rolled his chair over to the display in question, flicking past most of the listed information until he reached the diagrams at the bottom.
Oh. "Well....shit. So much for joking."
"Indeed. Congratulations, sir. It's a girl."