The amount for a married couple is changed depending on whose account you are using. For example, if you are drawing off your husband 's account, his would likely be reduced. If you have your own work history from which you draw, yours would not be reduced, nor his.
When you get married, your social security amounts might get reduced because you will probably pay tax. However, one can prevent this by not filing a separate return. As for retirement the amount does not get reduced as the amount is calculated individually.