I'm back to my usual response to so many topics: how about you DON'T TALK ABOUT PRIVATE ISSUES WITH ANYBODY? Not your girlfriends, not your mother, not your sisters, don't put it on your Facebook page ... NOBODY!
PS - I think she's being irresponsible ... all parent/offspring combinations work, and the kids can look back later and point to their particular family configuration as being the source of their later strength, but for this couple it might be better to wait a while.
And to shut up about intimate private matters.