It would be amazing if there was some sort of family sharing, where I could share my content with one member that shares a billing address.

It would be nice for my wife to use content I bought with our money without me having to be a part of the group she's playing in.

Is this something that could be implemented in the future?

I doubt it will because it could create some havoc in the content sharing options. Who would get what sharing slots? 

Yeah, I didn't think about the sharing slots, I would be happy even if only I could use the sharing slots, but she could make characters with all the options without me having to invite her to a campaign to share the content.

Or we still only get the three sharing slots between the two of us for the family shared content. Even if we both had master subscription.

I have a Shared campaign that is just for my wife to make characters and read stuff.

I also do that at this moment, but it is a hassle if she wants to create more than one character for groups I'm not playing in.

We were talking about buying at least all the player options on her account, and I just got curious if this would even be considered by the dndb staff.

My wife just does a copy and paste of the invite link, if she wants to play the character somewhere she can export the pdf or use my ipad.