Q. A little over three years ago, I retired under FERS. I was a widower at the time, so no survivor benefit was being withheld from my pay. I now intend to remarry a French citizen and will reside here in the states for a time, then move to France. I would like her covered by my Federal Employees Health Benefits, at least while we are in the U.S. Can I sign up now for a full survivor benefit for her? How much will it cost me? I read somewhere that it costs 10 percent of my current annuity plus…