How does making donations to a charitable activity constitute an interest?
On the other hand, Mrs. Thomas was coordinating with POTUS's Chief of Staff Meadows in illegal activity (a coup attempt) that her husband may likely have to decide on later. Further, her activity has the appearance that she was funneling legal advice (or legal coordination) from her husband and to Meadows. These acts (of hers) call for her husband's recusal at a minimum, but SCOTUS justices conveniently aren't ethically accountable to anyone and so it is enforceable only by impeachment. However, impeachment of a judge won't require a 2/3's majority.