Rock legend Sir Rod Stewart recently shared a romantic anniversary photo with wife Penny Lancaster as he celebrated 17 years of their marriage. The Maggie May hitmaker, 79, reposted a sweet snap on his Instagram stories of himself and Lancaster, 53, on their 17th wedding anniversary. According to Express, the caption over the photo read: “Celebrating 17 years of love,” and showed the singer crouched behind his wife, who was seated in a chair. The couple tied the know on June 16, 2007, and Stewart himself added on the snap: “25 years together and no red flags.” The photo had initially been post…