Sike! Got ya!
Actually I DID have DW add me to her Orchard Bank CC as joint applicant. Orchard doesn't do AU.
However, we are doing this to add the TL to my CR, and then closing the account (RIP). This TL is old enough it will help my AAoA, so before closing thought we would take one more bit of advantage of that TL and its builder benefits of days gone by.