I don't think there has been a single one of us that hasn't had that happen. The addiction is a "for keeps" player and doesn't let its victims go easily. You have to take your bumps and bruises and "Cowboy up." Don't allow one slip to break the momentum. If you keep working at the problem, a solution does arrive. Hopefully, your wife will see your efforts and in time, forgive. But you have to acknowledge the fact you let her down as well as yourself. Realization is not a castigation, but a tool to improve, so don't continually beat yourself up—that takes valuable time away from self-improvement. It's a tough fight, I can personally attest to that. But we're an army here, and our job is to fight a common enemy, whether is booze or pills, we're fighting what takes away our life, our families. Like the Iroquois example of strength in numbers: a lone arrow is easily snapped in two. Many bundled together are unbreakable. I hope this helps some.
Peace—
Padraic