I want to talk a little about my second pregnancy. I want to have two …

I want to talk a little about my second pregnancy. I want to have two children, but my husband is against it. How can I explain to him that having two children isn't just another member of the family, but also support and a pillar for our son in the future? After all, we're not eternal, and during difficult times, they are support for each other, being friends with one another. Of course, I am afraid of giving birth for the first time, plus gaining 20 kg. The baby is already almost two years old, and I haven't gotten back into shape yet. Who has gained weight during their second pregnancy?