> I would probably leave out the fact that you are "husband and wife."

If that were the language I’d probably agree, and probably wouldn’t have given it much more thought than that! But I think “husband and wife team” swayed me from that instinct. It’s a good balance between humanizing and establishing a shared interest in using the thing they’ve built. I don’t know how representative my reaction is, but “we created [thing] because [actual human experience and need it satisfies]” tends to be a persuasive way to get me interested, and actual human stuff feels more pertinent to me in that framing than stuff about the humans detached from the thing.