Block the card so she can't use it.  She should never have had in the first place and daddy needs to tell her who pays for his lifestyle, if he can't do it then You should.  The shame might get him off his but and find HIS own way to cover her dream wedding.  Protect your money from her. She hasn't earned that right and she doesn't deserve your kindness either.   Give what you get from her:   Nothing.  This is a lesson many stepmothers have to teach.  

Shame on him for even letting be exposed to one bad encounter with her and not setting her straight.  Shame on you for letting it get this far.  Love yourself more please.  You deserve better.  

smh

Cut them all off from your financial gravy train and let them wallow in a total lack of funds.  Get this idiot out of your life with the message that he can take his failed family progeny with him.

Applogies from BM and the other SD, great. But if not from the one perpetrating the crap followed by a dedicated commitment to avoid the same behaviors... they are just excuses from people are not the cause of the problem.

Toxic SD and your DH lacking the stones to provide and to keep his toxic spawn in check, are the problem.

End them.

Lots of us let things go on too long. It's just unbelievable so we convince ourselves that somehow the bad behavior is an exception. So we let it go.

But you've reached your limit. No more financial support for the Bridezilla, at least. I am also the primary breadwinner in my family. We live comfortably and DH does contribute financially and physically, but if DH wants extra he has to figure it out. Like you, it took me a while to close the wallet but eventually I did. Both DH and SS abused my financial support. SD never did, but she certainly complained about what SS got and she didn't. I don't really blame her for that either.

Anyway, you must take care of yourself because nobody else is. And your DH can cut the crap by blaming you for any division in his family. That's on SD and on him for not shutting it down.

Hold on....let me get this straight. She has her dad's credit card, which YOU pay for??

What? That's got to stop, like yesterday! 

Unbelievable!!

Oh, Hon!

Where is your self-esteem? Why are you letting yourself be financially abused by an unemployed parasite and his outrageously entitled mini-wife? Surely, a peaceful, less stressful life would be an improvement on your current situation. I'll bet the farm that you know, perfectly well, that you are being used and simply need confirmation of this obvious fact.

Please leave this mess! Life is too short....

I kind of get the idea of financially supporting a signficant other. I have a friend who's husband has minimal earnings and often no job.  It suits her to have him look after their houses while she works ridiculous hours for a global conuslting practice.  Not what I'd chose but it works for them.

However, there have to be some financial hills you are willing to die on.  Mine is paying for an extravagent wedding for a skid.  I have told DH in no uncertain terms that none of our financial resources are going to fund a wedding!  I didn't have a big wedding because I think its a ridiculous waste of money so there is no way I'm going to pay for someone else's party.

Cancel the credit card immediately and bill your DuH and SD for the spend to date.  You won't get any of the money back but you will make a clear point.

EDIT

I went back and re-read your previous post.  Am I right in understanding that it was entirely your financial resources that were used to renovate the old family home?  Please go to a financial advisor and make sure that you are protecting your assets.