It goes without saying that many Filipino-Western marriages have a big age difference with the husband being much older than the wife. This is not true of all Fil-Western marriages, but I'd say a majority. I recently wrote an article about the age difference in marriages and posted within my web site.
http://www.philippine-islands-living.com/Philippine-marriage-and-age-difference.html
One of the issues I failed to mention was death. This is a huge consideration to take into account for any couple wanting to marry and have a big age difference. I am a 54 year old American and my wife is a 26 year old Filipina. That's a BIG age difference. Although, age difference in the Philippines it's not looked at as a negative as it is in the west. I was just diagnosed with lung cancer and that means I will be dying sooner than I planned when I married my wife. How Much sooner, I don't know. I knew four years ago before we married that with our age difference my wife could easily become a widow in her 40's or even sooner. She knew this also and we talked about this before we married.
With all this said, are you and your wife ready for death. Have you provided for your young wife. Chances are your wife will be a widow for many more years than she was married to you. Be sure she is provided for. Do you have life insurance, Money in the bank, stocks, what about your monthly bills and the mortgage. It's never too early to plan for the rest of your wife's life. If you really love her you will be sure she is ready and able to go it alone after you pass. Besides it's the right thing and moral thing to do. If you have not talked about these things with your wife, NOW is a good time. If you are not married yet be sure you get your will updated. If you are already married be sure your will is up to date. Show your wife that you really love her and have provided for her after you pass.