Her name was Marie-Therese Walter. She was 17 when Picasso fell in love with her. Picasso was already married, and 30 years her senior, so they kept their affair a secret. But he documented his passion by hiding her initials in some of his paintings. Of course, Picasso wasn’t completely ready to settle down, and he left Marie-Therese for Dora Maar, just like he left his wife Olga for Marie-Therese. But Marie-Therese never stopped loving Picasso. And she hung herself after his death.