Are there secular alternatives to Al-Anon?
Just a word of caution, if you do manage to find a secular alternative: it may be wholly different demographic than you’d see in a pure AA setting. I went to one meeting at a Unitarian church in Utica, some years ago, which advertised itself as a secular addiction recovery group. Most of the folks there (while perfectly lovely individuals of their own rite) were recovering from heroin or crack addiction. There was also no concept of a 12-step program, and was more group-therapy oriented than I was expecting. They have the potential to be a horse of a slightly different color than an AA group, I think, and might not be as applicable to your partner.