The Dangers of Being a Housewife

My family is very excited because my sister is getting married soon. The man she is marrying is rather high income, so she has decided to stay home and be a housewife. She told me she will cook, clean, take care of the baby, and all that. I would have thought those tasks would take out the enthusiam from anyone but apparently some (maybe most) women like being traditional.

The man she is marrying is rather rich, as I said, and as such he seems to have expensive tastes. He has in his driveway two Lexuses and he weaks Patek Phillipe watches. I have spoken to this man. His name is Stephen. I asked him why in the world he bought a Lexus LS when a Camry could easily get him from A to B for a fraction of the costs. I also asked him why he purchased a $30,000 prestige watch when a $20 Casio watch not only tells the time just as well but also has more features, e.g. stopwatch, countdown timer, and alarm. Stephen just laughed at me and told me he buys the Lexus because "it looks hot." The same goes for the watch. The man is obviously very much concerned about external beauty.

My sister is rather young and attractive. I am worried because as my sister ages, she will get less attractive. Based on his Lexus and Patek Phillipe, Stephen seems like a man who places high priority on external beauty and his wife's external beauty will diminish over time. In addition, as Stephen ages he will get richer and richer and as such more and more women will want him, many of them maybe younger and more attractive than my sister. Because of this, I fear he will dump her in the future.

Statistically, fifty percent of marriages end in divorce. If my sister is a housewife all her life, and if she is dumped at age 40, no firm will want to hire her because she has no experience. But if, instead of being a housewife, she focused on her education and maybe focused on her career, even if the man dumps her, she can have something to fall back on, something to help her stand on both feet in the likely event she is dumped.

I want to tell this to my sister but I'm afraid she might get mad at me. Is there any way I can communicate this concept to her in a tasteful and subtle way?