Imagine living a traditional life getting married to a person of the "opposite" sex, procreating and having kids, then deciding that honesty demanded you come out to your family.
There was a story on NPR about some oral history project the U.S. Library of Congress is doing. The NPR story featured a grandfather talking with his gay grandson about his own coming out to his family and life after marriage. The grandson part is a little lame -- not to belittle his experience, but it was. The NPR article online is also a little lame. I'd go directly to the audio portion and listen.
It would be very weird for me if either of my grandfathers (the live one or the dead one) were to be openly gay.