My thoughts are about the same as Mike's. I would not breed from her unless you want to find out more about the hen spur trait. You say her offspring have spurs. Since you mention that, I assume you mean her daughters also. How old are they when they develop spurs? Online searches talk about hen spurs, but there are only guesses about the genetics behind the trait. Some say they most common in older hens and Mediterranean breeds and a few others. Is the hen from an old/established line of Ameraucanas or was there some crossbreeding in recent generations?
With many decades of raising chickens I've seen many oddities, but I don't recall having a hen with spurs. If it happens most often in older hens that may be why I haven't experienced it. Most hens don't make it past one or two years here.