I have to ponder this. I would deeply bother me for sure. Why is "ow" in "limbo"? Can your h end the limbo by telling her in a way you can verify or witness, that there is no limbo and he is married to you, etc. Obviously even if your h is telling the truth and this woman misunderstood and then misrepresented their R at Your home....she is not someone he can have a "friendship" with. That would have to be totally over and that's assuming you believe him. How can your h expect to continue any type of R with her if he is essentially calling her nutty or dishonest? This is a bit more than a misunderstanding, but HE can clear it up with you being there or somehow getting reassured. I have to go ponder more but I don't know what your h is saying he wants NOW from your M, and what he was like before.
Her comment about being horny and needing him to oblige--is that a quote? Why on earth would she print that in a letter to your home? Wildly inappropriate for several reasons. Sorry but it ain't good news. So, what is your h willing to do NOW to reassure you that whatever type of R they had is now over?
Can you accept his promises about fidelity from this day forward, if he makes them? Can you let go of your questions about what happened, and if so, what will it take for you to be able to do that?
How long is the M and has he ever done anything like this before? What do you think happened? What do You want? What do you think your H wants? j-
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016