Don't tell him anything.  Or tell him stories that are not toyalky true.  Like you are leaving SD loads of money in your will.  No amount but loads.. 

Husband continually overshares.

AND I speak to him about it.

Too bad you cannot stomp his foot at the beginning of the situation...

Cant you talk to him reasonably? YOUR finances are YOUR finances

Sorry to say but it's time you went absolutely effin' nuclear! No more pussyfooting around.

"DuH, your offspring have NO business in my life so cut it TF out! Do you enjoy gossiping like a pathetic middle school mean girl? Seriously? WHO are you married to? Share just one more detail about my life and our life together will be over. Who do you want to be married to? Your spouse or your daughter? Your call. "

Does he talk to her during dinner? If so, you should get up and leave the table - let him have dinner with her. Maybe that would wake him up?
I know disengaging is working for you right now, but him discussing your personal finances with her would be a hill to die on for me. I guess the only thing for you to do is never tell him anything that you do not want her to know.

"DH, I am sad that I am at a point hwere I need to do this but I'm going to stop sharing things with you. Not because I don't want to be able to freely communicate with my husband but because you choose to treat your daughter like she is a partner in our marriage. You are telling her things that are not her business or concern and I've been quietly waiting for you to realize how inappropriate it is but that hasn't happened. I don't know why you would do that to me but since you're choosing your route, I'm going to choose mine. I am not confortable or happy having a three partner marriage and while I understand some contact w/ your daughter, you have invited her too far into our lives and it has me concerned about my privacy and our marriage" 

Cut him off. No discussion with DH of anything of matter. Make it all inoccuous and embarrassing. Talk about DH's ED issues, or prostate health, or how unsatisfied you are intimately, or how his aging gut is a turn off, your mentrual details, bowel movements, or ask how SD's growing body count is progressing, or, or, or, or. Nothing he can share without baring his own idiot ass.

Cut him off from your finances, financial information, any significant information at all, and keep his nose rubbed in his idiocy whole baring his ass about violating your confidences and the sanctity of your marriage by sniffing his idiot daughters ass whole whispering anything and everythign in her ear.  Drag him to couples therapy and make each session about his incestuous digital communication relationship with his spawn.  See if he will share his continual ass baring with her.   Make sure you regularly ask him if he has shared those things with her since... that is all I would give him to talk to her about if I were you.  I would also make sure you scrub his nose in it with regulary "So, how does it feel to not know anythign to talk to your emotionally incestuous spawn about?  Hmmmmmm?"

Rant away BTW. Though I advise formulating your action plan while you rant.. then take action. No action, nothing changes.  I would make sure you light the burning platform to keep the heat on DH to make a change and he stops betraying you and his marriage to youw with his kid ass sniffing emotional incest with his spawn.

Yes, it is completely infuriating... and just WHY do they do this! My husband does the same and yes his spawn calls daily at dinnertime or intentionally interrupts any event going on with her stupid phone calls. Theres nothing important that warrants a phone call ever, its an intentional disruption and H does nothing to stop it. I have told my H what I think about it and that our marriage has 2 people in it, not 3. This is my typical day...

H comes home from work and uses me as a soundboard to bounce his work stuff off of. Im absolutely fine with that, I actually enjoy hearing about his day. But here comes the problem. Daughter calls a couple hours later and he repeats, almost verbatim, everything he shared with me to HER. Also sharing other insignificant things, and sometimes very important things like finances, that happened thats none of her business either. Why does she even care?  I just dont get it... thats what wives are for, not daughters. I have reached the end of my rope with this, I called it out with H and i gave him a test. He failed of course!

I told him I didnt like him sharing his work stuff with her just the same as he did with me prior. Short version, dont tell ME anything he plans on telling HER later. That there are many things that are just OURS and it diminishes me and my importance when he does this. I explained the importance of priority in marriage vs. responsibily. and that he needed to understand this. If he couldnt we needed to go see a lawyer. I even backed up my position with a preachers sermon. Yes, these men are confused and so are their clingy daughters. Enmeshment, attachment disorder, parentification, whatever ya wanna call it... Im not having it!

this is the priority of all things.

God

Spouse

children

extended family

church

work

etc.

No, the children are NOT the first priority, ever. The spouse must be the priority because that aids in the responsibility to the children.Children may be the first responsibility, but priority and responsibility are not the same thing.A marriage cannot last if the priorites are wrong.

As for my "test". I told him to tell her ahead of time we had plans on this day at this time so she would have to call someone else that day. He was not available. So we go out for the evening as planned. Shockingly, the phone doesnt ring. I thought, FINALLY, i got my message through. Then a few moments later I look over and they are texting each other back and forth. I was furious! Im about 100% sure the daughter initiated that just because she was being spiteful for being told not to interrupt. But he still participated and that there is the real problem. PRIORITY! He prioritized her over me yet again when all I demanded was a couple of hours... he failed!

So now I call it out in real time. While shes on the phone, i make sure she hears me. "she dont need to know that" "why are you telling her that" "thats not her business" Do i care what she thinks, not one bit. And him too for that matter. If he wants to treat his daughter like my equal, or her playing the mini wife role... they can have it! I will focus on me and I am coming to terms with my reality. This is not going to work for me anymore. 

I feel your pain and frustration... no one understands until they have lived it. I question if im the crazy one and this is normal... its not normal and we wives are not the problem.

They are totally enmeshed. DH used to over share with BM and MIL and it always bit him in the ass. 

I remember one year we had no money, so I gave DH a bunch of coupons for his birthday. Fortunately, I didn't include anything sexual, because without even reading all of them he said, "mom, look what struggling made for me!" And handed them to MIL he went and read through them all.

I've had to be very clear with DH on things that cannot be shared with anyone, including our finances, jobs, trips, etc. I don't need anyone's opinion and it's none of their business.  

Why aren't you ripping the phone from your codependent husband's hands  and telling this brat SD this is none of her business or to stop interrupting at dinner time? I'm sorry but it sounds like you're enabling a lot of this. 

I have too big a mouth to stay silent in a situation like this. I would DEMAND that he stop sharing info about me or anything I've said. In fact, during some conversations I have with DH, I specifically say, "Please don't share this with your kids . . . ."  and he respects that. 
If you choose to stop providing info to DH that you don't want him to share with mini-wife, you are then inviting distance into your relationship. That might be the right route or ok with you, but then your marriage shifts, which also might be ok with you. 

I'm the primary communicator.  Because that is the case, I use commute time to speak with friends, my parents, my brother, etc... That way we I get home, it is our time.  Not everyone else's time.

What I discuss during my commute catch ups, rarely is what DW and I share with each other after work.  I'm not sure why that is the case. I will share who I spoke with and a brief of what was discussed, but it is not the same discussion.

DW and I share our day, discuss different elements of our day, and we focus on us together. Not a master planned SOE by any means, it is just how we do it.  Some days are predominantly similar to prior days, others include far different discussions, deeper fives on work, family, friends, us, etc..

What is a given is that it is about us.  When we are at work, that is where we are. When we are with family, that is where we are. When we are talking with the kid, etc, etc, etc... that is where we are.

I had a work training event seemingly countless decades ago that among other things addressed the topic of "Be here now."  In other words, be where you are and be their fully.  If you find yourself day dreaming, then commit to that and day dream.   Then get back to work and be there.  IMHO the same applies to being a couple and making a life together. Be there.  For damned sure do not answer the phone, look at a text, etc... when it is couple time.  

People train others how to treat them.  We train others how to treat us, how to treat our partners,  how to treat  our marriage and life together, etc.  A big part of that is the immediate contact, reply, and share it all crap.  That is not for RL.

That is for STalk.

Sadly tnat is for social media as well.

IMHO of course.