Susan,

I match your mom: 7 cM on one chromosome. I also match your husband, but more distantly.

Largest segment = 5.0 cM
Total of segments > 3 cM = 20.5 cM
Estimated number of generations to MRCA = 6.7

For what it's worth, I don't have much Irish ancestry. And what little I do have, it's quite distant.