You know a good friend of mine told me at the time my xh left that the sex in MLC is largely in their heads! At the time I thought he was wrong, and now I am not so sure.
One of my friends whose xh had (and is still having) a MLC - one of the slow ones(!) discovered later that the woman he left for he stopped having sex with when he moved in with her. Nada for at least a couple of years. And he left for (among other things) a better sex life.
It makes you think just how much of a fantasy world they inhabit
I can believe that now that I see more of the reality of my W's MLC situation... this started with sexual fantasy (can't go into details -- but I do know that's how it started) online, which resulted in this odd friendship that grew into something more... BD occurred once I realized their sexting fantasy stuff had moved from sexting about celebrities to sexting to each other and expressing their "love" for one another... Very convenient that OW is "saving" herself for marriage but immersed herself in an enormous amount of written fantasy (which attracted my W)... There are also some other things I have picked up on that are too personal to share here -- but there is more that I know related to this not being better than the reality that W has had with me (physically).
Oh well... nothing I can do about W's choice to live in the fantasy world rather than work on improving reality. :-)
Me 48, Her 50 (Same-Sex Couple) 3 Children Together: 9.5 years before BD BD: Week of 10/27/14 ExW started EA w OW 9/2014 ExW married OW 12/2015
slow ones(!) discovered later that the woman he left for he stopped having sex with when he moved in with her. Nada for at least a couple of years. And he left for (among other things) a better sex life. 