There is absolutely nothing in it for you or the other woman and everything in it for him, or so he thinks. Likely it will make him rot inside. That kind of thing is way too wobbly to not topple and then you will be stuck in the mess. He is selfish, a liar and a coward, you deserve better than a cheater. There are better people to spend your time with, so why bother? Either he talks to the wife or "see you later" as far as I'm concerned.
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