As a sponsor, I make it clear I'm not perfect and don't have all the answers. I've made similar mistakes, and, like you, I've had to make amends for it. Once I do that, I try my best not to dwell on it. Recovery is a process, and if I'm going to tell a sponsee that "she's right where she's supposed to be," I've got to accept that I am, too -- perhaps a little more humble when facing my humanness.
If you don't believe guilt to be a productive emotion for your sponsee, how about you try not to harbor it yourself?
Peace & Love,
Sugah
P.S. I also tell them I'm not their mother, and even as a mother, I try not to carry around guilt -- but
just in case they think I should...