Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Is your husband able to invite you to share the subscription (https://support.microsoft.com/en-us/office/share-your-microsoft-365-family-subscription-b389b9ce-3ae3-4a82-9017-39d79972fcba)? The fact that you are part of the same Family Group is just one step in the process.
When you receive an invite, follow the steps at to accept and set up the subscription using your account, as discussed in the article at https://support.microsoft.com/en-us/office/someone-invited-you-to-share-their-microsoft-365-family-subscription-6a6c098e-1934-4436-9a94-69c92590da5b.