I definitely see an attitude of us vs. them and an animosity towards SSPX as opposed to other protestant denominations on this forum.
The issue, in this case, is not the denomination, it’s the behaviour in the couple. If it were a Protestant/Evangelical/Jew vs Catholic I’d say the same thing.
I know wherefrom I speak, I lived through this in my marriage soon after my conversion. Fortunately sanity, with the help of a very gentle monk, reigned and my wife no longer sees my Catholicism as a threat, and attends Mass from time to time and came with me to Rome for the last World Oblate Congress.
My parents were the example on this front. My Anglican father married my Catholic mother in 1955. They were married in the Church, but the deal was: marriage in the rectory by the priest, not in the church, and my father agreed that the offspring would be raised Catholic.
He took his duty seriously. If my mother couldn’t take me to Mass which was often as she was sickly,
he would, and he’d sit in the pew through communion while I went up.
We could all learn a few lessons in humility from him. Alas he passed away when I was 12. I’m 57 and his loss still affects me.