Did you at try to lower the noise near your partner? Looking at the picture, I think a carpet and curtains would help. (I do realize that the picture was taken by the realtor before selling to you.)
This might help to remove your partner's remaining voice from recordings at least in your current situation.
There are thermal curtains now. We could carpet that space, though carpets are a pain to wash, and that area also gets treated as a mud room, sooo yeah, probably would get too messy.
I might try hanging up the acoustic sound panel at the start of the curtain track in the bedroom to see if that helps. I suspect the sound waves will just ...wave around it? But I am clearly not an audio engineer. :)
This might help to remove your partner's remaining voice from recordings at least in your current situation.