We are married for 6 years now.
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Next time that he was around we all got horny and ended up in bed, it was so hot seeing him sucking her tits and her sucking his cock, and them fucking.
The sex between us became less and less and a month later she told me she'd been shopping with this guys wife and she'd treated my wife to loads of new expensive clothes and she started hanging out with this woman weekly.
But if she turned around and told me that she wasn't into it anymore it would lose its appeal.
So I think your first mistake was contininuing to push the lifestyle on someone who wasn't into it.
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We were all 3 unexperienced so the first time was a bit awkward.