Dina Eastwood has heard the question repeatedly: Why put her family and superstar husband Clint Eastwood on display for a reality TV show, generally the province of D-list or wannabe celebrities? The answer is simple, she said. “Mrs. Eastwood & Company,” the E! series debuting Sunday, is her bid for stardom — not for herself, but for a vocal group, Overtone, that has become her passion. “I had a midlife crisis and I adopted a boy band,” said the breezily candid Eastwood. “I was edgy, I didn't know what I was doing. Clint was accelerating how many movies a year he was doing. Our youngest daughter was getting to the point she doesn't want to be around me as much.” Eastwood, 46, discovered Overtone at a concert in Capetown, South Africa, where her husband of 16 years was making the 2009 film “Invictus” with Morgan Freeman as Nelson Mandela. The six-member group ended up a prominent part of the movie's soundtrack and Dina Eastwood made the leap to manager. “They're very good-looking and the best vocal group Clint and I have ever heard,” she said. “I was thinking what a cute little reality show about a haggard mom who doesn't know what she's doing, leading this cute band around trying to ... get them successful.”