If she had other children, I don't understand how that would make her any less sacred.
These are things I don't lose sleep over and one that shouldn't be a stumbling block between Catholics and Prots.
Well, don't worry about it then. But it's important to Catholics, and not for an irrational reason. That's all.
If it "shouldn't be a stumbling block," then modern Protestants should have no objection to persons who hold to the ancient teaching of the church, endorsed by St. Jerome, the Popes of Rome, the Eastern Orthodox, and all of the original Protestant reformers (including both Luther and Calvin).