Why the first paragraph about your wife not taking your upgrade? You don’t mention that the talking bothered her at all…and she was sitting in Row 10… Since this post is all about how the talking affected you, I’m not sure why it’s there… Just an observation.
Sounds as though the passengers did eventually quiet down within 15-20 minutes of the FAs getting up, and not even necessarily as a result of your complaints to the FA.
Seems to me you made a bit more about this than necessary. That said, I’m sure your fellow FC passengers enjoyed watching the glares and the “throat cut” and “shhhhh” charades… Short word...Sounds like...Three letters...Pirates of the Caribbean...