We have this as well. Out of interest what do you want to do with transactions that you have split between you? The other option is to get yourself a child card as well although I’m not sure if this is possible?
I left a comment on this the other day. I have an issue as I am not sure how to easily split out these transaction so that only half appear on my analytics but also that I can add them to a group so that I know what amount my partner needs to pay into my Amex.
I am yet to find a really good to solution like Emma for couples though - these apps are built with single people in mind but having something that really supports couples would be great!