This episode wraps up the Zashiki Warashi Arc. As the room they were in was an abortion room of the whorehouse. Zashiki Warashi are the babies that were aborted, which outlines the truth. The thing that connects the woman to them is the regret that the woman had a miscarriage, more than likely with the symbolism being used.
I think she is still pregnant with her child because, as she mentioned to the Mononoke, I can’t give birth to them. As their regret of being born will never come true. But in turn she was able to accept them, which is what they needed to allow the apothecary to put them to rest. It is sad because they just wanted a chance to live, and it was just a matter of bad circumstance that prevented that.
