It's difficult to catch the intent here. Is it this: Marriage will keep rolling along, even as mutual fancy diminishes.
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AntonijaHello Davkett,Even while mutual fancy diminishes, the marriag
I think I shouldn't use inversion because of the following sentence:
Once when feeble mutual fancy diminishes/disappears, the marriage wil keep rolling. Inside, you will pout and growl, but from the outside you will try to make at least some kind of appearance.