I'm LC with mine, we have a very superficial relationship. I initiated this to protect myself from their narcissistic behaviour while still enabling some contact with us and young grandchildren.
I never know what to say to acquaintances when they ask about my parents, it's usually the kindly meant 'are they close by, oh that must be such a good help with the young DC'. I've tried brushing it off by saying we're not that close but that seems to get puzzled looks and a change of subject.
I don't want to make people feel awkward but I also don't want to gush and say it's great to have them nearby when it's not. What do you say?