[Wolferz]

Probably won't be an issue unless you're together long enough for her to reach menopause, then it can get a bit dicey and after that comes all the retrograde effects of the aging female body like osteoporosis etc.

Unless you are willing to make a long term loving commitment toward her care, you're going to have an issue.
My current wife is four years my senior and the last twenty years have seen her in degrading health due to one accident after another putting her flat on her back for extended periods of time. I'm talking almost totally helpless flat on her back.

But, always the big but, if you have found your soul mate, there shouldn't be any hardship too great.
Weigh your options carefully and good luck.