Synopsis:
Frasier and Niles accidentally see Martin with Marion, an old family friend, at a restaurant. After seeing how they acted with each other, Frasier and Niles do some investigating and suspect that Martin and Marion had an affair. When the boys confront Martin, he tells them that they did have an affair and not to bring it up again. Marion pays a visit to the apartment and tells Frasier that his mom, not Martin, had the affair, and it was with her husband.