You say~ The timing of it all resembles a bait and switch ploy.
Sometimes women are fantasizing that the sex will become ultimately satisfying with a declaration of lasting love via holy matrimony. But it doesn't. And the repetition of an in and out motion gets frustratingly boring after you have given up hope of ever getting off. Those who married for financial security must fake ogasms to keep that financial security. Those who did not, are more likely to get real and leave if the sex is destined to remain perpetually frustrating.