Stake won't understand the this mistake unless you make them realize your mistake, prove to them that you and your husband are on this together, and make sure your husband also pass KYC too, this is the only way forward.
I hope you have learnt something from this, don't ever repeat such again because any online casinos can't be held responsible for this type of matter, because you broke their rules and regulations first, they have every reasons to misbehave with your account and the money on that account.
My advice for you is this, before doing anything on your casino account always make sure you read through the ToS very well, make sure that what you are about to do won't get you into trouble next time.