Ok, ok. Look now, what would be my spouse's benefit if she is already receiving benefits?
If that's the case, you'll have to ask your spouse what its benefit would be if it started at full retirement age. Then, you'll have to divide that on half, rounding it to the nearest dollar. That would be the benefit.
And what about if i want to retire before the normal age? Would be any effect?
Sure, there will be. If you retire before normal age of retirement, then your benefit amount as spouse will be reduced and could be up to 30% of reduction. That percentage is based on your date of birth.