Interdependent is a word that's used for a healthy relationship if you Google it it should come up with an example.
Ex used to get so freaked out if our voices in a Restaurant would go above a normal tone. No excitement please..no laughing out loud. Hands in laps- everybody behave.
For my d20's 18th birthday I took her and d17 (then 14) to a really nice restaurant to celebrate.
I told the waitress on the side about her "special Birthday".
After dinner they brought her a piece of cake with a candle and a quartet of waitresses sang happy Birthday-in fact the whole restaurant joined in.
The look on her face was PRICELESS! She LOVED it. I sat and laughed out loud all the way through it.
The ex would have been HORRIFIED at such joy being expressed in public that loudly..and that the attention would have been at a table HE happened to be sitting at! My, my how un-proper!
This is a normal healthy way to celebrate a birthday.
What your W is doing is inexcusable as an adult in a place of worship. The behavior can only be ignored by you.
You can not appeal to her sense of what "acceptable" is as that will probably only lead to more outrageous behavior because she knows she's pushing your buttons.