Rod Stewart's wife came in clutch when her stepdaughter needed some help! On the Postcards from Midlife podcast, the music legend's lady Penny Lancaster got real about the birth of her step-grandchild! Rod's daughter, Kimberly Stewart, was having some issues back in 2011 after giving birth to her daughter Delilah with ex Benicio Del Toro, per the 54-year-old's story. Apparently she wasn't producing enough breast milk to keep up with the little one's needs - and that's when Penny stepped in to help out.