Mary Merideth + Lady Hollaway - Lesbians?

You wish...
Where did you get this, you stupid git?

Mary Meredith and Miss Hollaway had some kind of affair going on. Unknown if it was consummated but certainly an 'emotional' affair. Since they were upper class, prolly they did consummate the affair, since that kind of thing happened with the upper classes. (Eleanor Roosevelt and Virginia Wolf were upper class.)

Early on, my wife picked up a lesbian vibe from Miss Holloway.

I don't see their affair as evil or perverse, just like I don't see Meredith's affair with Carmel as perverse. Just the stuff of drama.

But Mary Meredith did commit an evil act, trying to through Stella off the cliff.

The Production Code affecting films in the 1940s meant that homosexuality, extramarital affairs, and out-of-wedlock births were referred to cryptically in The Uninvited to meet the imperatives of censorship. Viewers learn that Mary “feared and refused motherhood,” and is therefore blamed for her husband’s affair with Carmel. Mary, Carmel, and Miss Holloway are all punished for their respective sexual transgressions – asexuality, heterosexual promiscuity, and lesbianism – with death or, in Miss Holloway’s case, a mental breakdown. The character of Miss Holloway was recognized as a lesbian by the Legion of Decency, whose (male) leaders complained to Paramount executives about the scenes in which she speaks romantically to Mary’s portrait. Lesbian audiences in the 1940s also grasped the inferences and characterizations in The Uninvited, and film scholars note that it became a cult hit with lesbian communities in wartime America. Mary is depicted as asexual or possibly a lesbian by being non-maternal and too close to Miss Holloway, and the novel describes her as “unnatural,” tying in with discourses about motherhood and gender essentialism. Later film scholars have seen even more lesbian connotations, suggesting that the mother-daughter trope in the film can be a cover for lesbianism, since Stella has been in love with another woman, Mary, her whole life, much to Rick’s frustration.
http://www.btchflcks.com/2013/01/classic-literature-film-adaptations-w eek-the-uninvited-1944-and-dorothy-macardles-feminism.html

Miss Holloway, an “unfeminine” single woman and nurse who had been infatuated with her friend Mary and still worships her memory, is significant as a lesbian character in the days of the Production Code. Her name recalls London’s Holloway Prison, where suffragists were incarcerated earlier in the century, and the convalescent home she operates is a prison of sorts where female patients lose agency and autonomy. While Miss Holloway’s narrative seeks to contrast Mary’s moral perfection with Carmel’s depravity, the Fitzgeralds are so put off by this stereotypical sinister lesbian that they begin to think that things were not all that they seemed. The character of Miss Holloway shows The Uninvited’s indebtedness to Daphne du Maurier’s popular Gothic novel, Rebecca (1938; released as a film in 1940), as she bears a strong resemblance to Mrs. Danvers. Both are portrayed as sinister lesbians who idolize the dead woman at the center of the mystery and play a key role in reinforcing her iconization.

I usually dismiss the "gay subtext" thread that pops up for nearly every movie as nonsense, but in this case it is clearly valid. At the least, Miss Holloway was obsessively in love with Mary, and a sexual relationship between them is plausible.