While your wife is entitled to half of any private retirement benefits you earned during the marriage from date of marriage to date of separation; thus the last 4 years would not count), social security is different. The only thing she is entitled to is the option, if married to you for more than 10 years, to take the greater of her own benefits or an amount equal to half of yours; neither option would affect your own benefits, which would stay the same. Spousal support is a complicated issue involving dozens of different factors, but the primary one is your respective incomes and needs.
Answered on Oct 03rd, 2013 at 11:03 AM