Smitty.... I'm sorry you had such a rough night.... it's none of my business, but I will comment on what I see here... first of all, it seems you are playing the role of martyr and victim... the person everyone abuses starting with your daughter and her fiancee.... why is he even living there? Your business, but really.... whatever happened to the old "I pay the bills and as long as you live in MY house you will abide by my rules!!" adage??
We have ALL reacted the way you did to your husband's unfair accusations, but they get us NOWHERE!! IF he is truly in OW withdrawal, or ANY withdrawal, you will see monster and it's not easy or pretty.... but YOU will have to toughen up.... EVERYONE IN THAT HOUSEHOLD is counting on YOU!! Yep.... it's not fair and it SUCKS!!
Do NOT give your husband extra money just because he is whining and accusing you of untrue things....my husband thinks EVERYONE has his hand in his pocket, yet HE is the one that spent about $20,000.00 to have his OW fling that is making him so miserable now!! That is money we will NEVER see again... he even said last weekend "Every penny I spent up there was a waste!" ya think???
I would ask you GENTLY and KINDLY WITH LOVE to examine your part in this.... I know it's hard... but the FIXER IN YOU is trying to stay in charge, and that's not good FOR YOU. IF you invite your daughter's boyfriend (cuz in order to be a fiancee in REAL LIFE, he would have to have SOME way of supporting them and some PLAN!!) to live with you, you cannot ASSUME you get to tell them how to live (even though I mentioned it above with the "as long as you live in my house...." bit). If you don't like it, suggest they would be happier under SOMEONE ELSE'S ROOF... uhhhhhh, maybe their OWN!!
Your husband would like to think he has some authority around the household, but he pretty much gave that up when he went off the deep end... HOWEVER, you must STILL respect him as your husband and not try to control or fix him, though he NEEDS it, LOL!!
Now, I wasn't there, and it's not my business anyway... so if my "lecture" is way off base then I hope you will ignore it and forgive me.... one thing I do FIRST whenever I get angry or fight with my husband is look at MY part of it... it's the only part I can control... and a lot of times I see I was just feeling low, or insecure, or picked on and low energy... other times I had to realize I was caught up in self righteousness.... victimhood.... it's good to question yourself! ((hugs)) LG