Piero Lardi Ferrari is the extramarital son of Enzo Ferrari and also happens to own a 10% stake in the Ferrari automotive company. Piero was once a part of Ferrari's Formula 1 program, as well. It took Enzo a full 27 years to acknowledge Piero as his true son, but then the younger Ferrari was welcomed into the fold. Enzo had waited until after the passing of his wife Laura to come forward and admit his affair.
Thanks for the tip, Carlos!
[Source: Argentina Autoblog]