A good hubby will slow down, and as you get fitter, you will revel in climbing faster than him, you can rub it back in his face some
But honestly, riding more will be the biggest improvement you can make. Keep it up and have fun!
(I was easily 2x my wife's weight when we rode a bunch together, and while I did ease it up so we stayed together, she'd dance on the pedals away from me on any hills. I's one proud hubby in those moments)