Obviously it's not for everyone, but I had this conversation with my parents after telling them I planned not to have children and it was... Fine? Kind of a bonding moment, even, we mostly just laughed about it.
Not every parent/child relationship trends this way, but for some of us there's a point in adulthood where you just become friends with your parents, and the parent/child roles sort of fall away. If everybody's mature and secure enough to handle it, talk about whatever the hell you want to.
The SSA has a great site showing projections into the future of various proposed modifications. That plan specifically does not on its own solve the problem completely (though it does help, extending the time frame for exhaustion of the trust fund out to 2060 or so). If we wish to avoid the exhaustion of the trust fund, we'll need other measures as well.