Sure, I can become more attractive, but that is NOT going to change any of HER problems.
Are you sure? Hanging around an attractive person has a way of perking people up. Think about how you'd feel if a cute young hottie started paying attention to you. Never mind whether you'd reciprocate or encourage anything; just think of how it would make you feel. Your wife would get that same charge if an attractive man (you, if you play your cards right!) paid attention to her.
Your youngest is 11. You and your wife should be stepping out regularly, since there's no need for babysitters. Join a gym, go out on dates, do things together that take both your minds off your problems and let you have fun together.
a fine and enviable madness, this delusion that all questions have answers, and nothing is beyond the reach of a strong left arm.