im_free, my husband and I have been out for a similar length of time. For the first couple of years we were very protective of our "fade." After some time though, we begin to question what exactly we were protecting. We decided that over the long term it would not be possible to hide our exit, nor did we want to pretend. If our family relationships were to be tense, we wished them to be tense in honesty, not over some subterfuge. We chose to always answer truthfully when questioned, or else to say "that is a private matter, thanks for not asking again." Whenever we are invited to a meeting or memorial, we politely decline, but we definitely decline.
Yeah, relationships with our parents are strained, maybe broken. But we do not have to hide, pretend, or lie, and that feels so much better.
YMMV. Best of luck.