The W, I think, doesn't know how to behave around me. I don't blame her, she only has one support person (the OM) in her life right now, and that is sad. He is sad, they are sad. They are pathetic.
Trying,
Let her stew. Remember -- "Never shelter/rescue an infidel from the consequences of their infidelity." One of those consequences is your PROTECTION of her feelings. Treat her respectfully, yes, even cordially. Do the things around the house that are expected of you -- and then a little bit more. But do NOT try to cheer her up. DO be cheerful yourself, as you have correctly noted.
