Ask Social Security Questions and Get Answers ASAP
Your wife can apply for benefits under your account once she reaches 62 years old. This will not reduce your benefits. Her benefit will be 1/2 yours or a benefit based on her US earnings record if she has one.
When you pass she will be entitled to spousal benefits which will be what benefit you are receiving at that time. However, she cannot receive spousal benefits and her own. There is also a one time death benefit available to a surviving spouse. It is not much ($255) but should not be overlooked.
The benefit application process can be handled at any Social Security Administration office or on line at www.ssa.gov