deborah vance is so sexually repressed she can do literally anything else in the world with ava except be sexually vulnerable with her man it is tragic. it's tragic. she's made so many jokes at the expense of lesbians over the decades that she feels completely separate from them as if queer women are a different species she has no access to although as we saw from the last episode absolutely nothing separates her from them anymore. she has a wife. ava is her wife. she has a queer female partner. they do absolutely everything together. they even purposefully convince people they are together and kiss, now, i guess, if deborah rationalizes it as useful.
but it's always going to be for a bit at this point because ava isn't going to challenge this since she clearly decided to let it lie after so many poor reactions from deborah and she's found a way to work around it by having a sex life outside of her while sharing a, for lack of a better word, "queerplatonic" relationship with her. therefore deborah vance canonically remains "safely" in the closet and will never acknowledge it, only ever taking a peek outside it through carefully crafted plausible deniability.
the tragedy is that she is completely safe to explore this with ava, has been for years, nobody else even needs to know, but she is more likely to take this closet to the grave than do this one last very brave thing. this isn't quite a criticism of the show although it would imo be a much more interesting show (rather than the socially conscious feel-good romp it's trying to be these days) if it looked at things like this more head-on, but it literally does make me feel sick if i'm honest