You can turn on your mobile hotspot and allow your husband to tether his phone to use your data as long as you are close to each other.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Good morning @Troice , how are you getting on since you last posted about sharing data? Did either of the above suggestions work for your purposes? Let us know if you have any additional questions at any point!