Call me the next Youth Day - Librarian Edition

As Alex opened the book he just borrowed to the library, he saw something falling on the floor. He grabbed what it appeared to be a photo... of a sexy woman teasing him.
Alex didn't know her but after a good look and thanks to the background, he finally guessed:
"Is she... Theresa ?!"
Theresa was the 60-something librarian. Later, as she recorded the book Alex borrowed, she discretly slipped this picture of her with the following message : "Call me the next Youth Day !". Alex never thought the old librarian could be so kinky.