SSA changed retirement years a couple of decades ago. If she is 53 now, her retirement age is 67. Those who are currently in their 40s, their retirement age is 72. When you get your report from Social Security, it will tell you.
Why Did the Full Retirement Age Change?
Full retirement age, also called "normal retirement age," was 65 for many years. In 1983, Congress passed a law to gradually raise the age because people are living longer and are generally healthier in older age.
The law raised the full retirement age beginning with people born in 1938 or later. The retirement age gradually increases by a few months for every birth year, until it reaches 67 for people born in 1960 and later.