@palhockeymomof2 gave you good advice. As you move forward here, consider not adding your P2 as an AU on future cards (unless there is a specific benefit you just have to have), just so you don't limit each other's x/24 options. We like to use digital wallets like Applet wallet or Google pay if we are both using the same card at the same time, or paypal, etc.
Supporting each other with support links is a very smart way to earn more points and I also like where your head is at as far as having the same cards, as it can be helpful to be working with the same currencies.
Feel free to ask any other questions that come your way.