The Princess Bride movie is a well done example of this, where the real world framing device lets the director suddenly skip the "boring parts." Since it is being read to a young boy (who is at the Girls Have Cooties stage), it mostly skips any explicit kissing as well.
It's not a reveal. We start in the kid's bedroom, and know perfectly well this is a story he's being told all the way through.
Pulled this:
It's not a reveal. We start in the kid's bedroom, and know perfectly well this is a story he's being told all the way through.