If you can pull off 8k of spend in the same three months, then I think
@Albort was suggesting you open the CSP too today. Then later you can refer DH to one or both and get more points.
Since you can only hold one Sapphire card at a time and you're locked out of the bonus for 24 months, the loophole for one person to get both cards is to double dip them on the same day. Since you got your CSR today, you'd have to be approved for the CSP today as well, which means 8k in the same 90 days.
If you can't, then no harm in having DH get the CSP later for 55k bonus (50k sign up + 5k for a AU card) or referring him to CSR for 60k (10k for you for referring, 50k for him sign up), but that would mean spending another AF (which if using both the travel credit and GE/TSA Precheck benefits again the extra points should cover spending the fee.) You'd have to work the numbers for your situation.
But congrats on the CSR! (should have lead with that but sense of urgency so you don't miss out if you wanted the double dip

)