Stay in role

WEAPON X​(dom male) - I am not being rude but it seems he has gotten tired of you and is looking to move on 80/20 your the 80 the others are the 20 if it is bad you might want to consider cutting the strings and walki g away

KingsPrincess{Not yet} - I think you may be right. He likes to tell me to stay in role while he does wtf he wants to. Not even thinking how it might make me feel. What gets me is his blatant rudeness of telling me how much of a waste I am

CapnRick​(dom male) - Time for you to step OUT OF ROLE and tell his sorry ass that there are some basic things he has gotten entirely wrong about his idea of being a Dom. YOU are the mistress of your household, and you have an equal say in how this new D/s relationship is going to be..
For starters, you might suggest he move out to some hotel until he gets his sorry ass into a more respectful place..THEN you two can discuss how you feel about sharing his cock with anyone else, and whether your marriage will survive if he continues down this path.
Trust me, he is WAY off the acceptable path for a new Dom !!
Good luck with reining him back in.

Justme26 - You deserve someone who will treat you with a lot more respect. Seriously, sometimes you just have to walk away.

MsHaven​(dom female) - You don’t ‘have a dom. You have a childish, selfish, asshole of a husband who is taking advantage of you and your new ‘lifestyle’ to cheat on you. And unless part of your arrangement is to be treated like shit, I hope you don’t tolerate his bullshit for one more minute. He’s playing a very selfish and dangerous game that he’s going to lose if he doesn’t wake up. Stand up for yourself.

Wiseonthree​(dom male) - I agree with all above, my mentor says she feels for your situation. You desire to stay faithful but he does not and that is not fair to you. I hope you step out of role to give him some piece of your mind. He deserves it.

Literate Lycan​(dom male) - Being in a D/s relationship does not mean the D gets to suddenly have more at the expense of the s. I concur with many of the well-thought comments above. Ultimately, your relationship should still be based on respect from both parties. And your relationship is what you both make of it. Hopefully you two can communicate through this.

TheAnt​(dom male) - I agree with almost everything said by the above Doms and subs and I want to stress a few things that may help "salvage" the dynamic.
First - Put your ideation of what your D/s dynamic is to you. What are the ground rules? Is it Monogamous or Poly? Sounds like you say Mono, he thinks Poly. If he suddenly think all Doms automatically are poly, he is wrong. You two agree on what the dynamic relationship status is. If you two cannot agree then it is not a viable D/a dynamic and I have to echo what others said and cease the dynamic. Was your vanilla marriage "open"? If not, why does he automatically think the kink relationship is open or poly? Do not feel forced to submit to being poly if you don't want it. Set it as a hard limit.
Second- make a contract outlining the agreed dynamic. Put down your expec6ations of him and his of you THEN ABIDE BY THEM!
Third- Demand a mentor for him.. a member of the old guard that fits your dynamic. That Dom should be a Master, or Daddy, etc.. it should be the same as what your husband declared himself to be.
Fourth-best a mentor for you.. hopefully the Mentor of your husband has a sub that is capable of mentoring you too.
Kitty and I mentor a couple that are the same dynamic as us (Daddy Dom/little girl) and I believe we are helpful. Hopefully you two can thrive with a mentor pair.
Fifth-and I realize I sort of sound like like a broken record, but so you know what sort of sub you are? There are a lot of different kinds. Find your inner sub. AND make sure your husband is the appropriate Dom for your sub. You set the dynamic relationship, not the Dom. No dynamic survives if the sub is not happy being the correct sub form. A new Dom can change his style to meet your subs needs.
Hope it was somewhat helpful.
-DA