The fix: Lie facedown on the floor, with each arm at a 90-degree angle in the high-five position. Without changing your elbow angle, raise both arms by pulling your shoulders back and squeezing your shoulder blades together. Hold for five seconds. That’s one rep; do two or three sets of 12 reps daily. Changing posture has to happen by working the postural muscles which are deep to the global muscles.
This could actually be a really cute picture for all three kids. One of each of their feet in the picture. Hero can have my engagement ring (diamonds are a girl's best friend, right?), and the boys can have our wedding rings, since they're identical other than size.