Commitment to self or commitment to client?

You are a social worker who works in a family service agency.  You have been working with a family (father, mother, two kids) for over a year.  Much of your work has been to empower the mother and have recommended she consider attending  Al-Anon to learn more about dealing with her husband's drinking behavior. You have also been attending a local Al-Anon group for quite a while and have established a support network through that group for yourself. Lo and behold when you attend the weekly group who walks in but your client!  Yes, you suggested Al-Anon to her, but you never expected her to show up in YOUR group! You feel uncomfortable sharing like you usually do.  What do you do?