I think that Mithluin’s post was about things that the speaking characters might be doing as part of the scenes where they are talking, not about what is happening in the background.
Human women? Hand-spindle-spinning of course. Even older ones can do it semi-blind if trained the whole life - their fingers wil remember the movements.
And young girls were trained early to spin too - if you need their hands to be busy. In former times almost all women went around with a spindle almost everywhere - when not cooking, feeding animals or working the fields, so not to waste time being idle. Insofar the spindle was a bit like the precursor of the mobile phone for girls in ancient times. Before the introduction of machine spinning (the spinning wheel being the first of said machines) most of the female populace spun more or less constantly, as the demand for threads was simply neverending.
[There are reports from Mesopotamia that making a special dyed cloth from 2,5kg/5,5 pounds of wool took on average 36 days of wool preparation 175 days of spinning and 22 days of weaving.]
Here a current Russian spinner (a very competent one) reports that 5-6 years old girls were given their 1st spindles made by their fathers [1:23]:
And she also confirms it was not affected by the bad lighting in a dim cottage - contrary to sewing or embroidery which needed good lighting [2:02].
As such all the women present in those conversation scenes - young and old - should all (already and still) be competent spinners.
We could even have a little wordless scene where Luthien picks up Emeldir's spindle while Emeldir fell asleep keeping watch at her sleeping son's bedside and finishes her spinning for her and Emeldir half-wakes to watch her do this - insomuch proving to Emeldir that there are some constant female values/virtues shared even accross the races' border and that even an elvish princess like Luthien still remembers how to do her own spinning (we have seen Luthien spinning before, but Emeldir has not).
Or a scene where one of the young girls hands to the other and Emeldir (and maybe even a visiting Andreth) a spindle and a distaff from a basket and each of them then proceed to dress their distaff with wool and starts spinning while chatting together and Luthien just comes in and grabs a spare spindle and distaff from the table and goes on to sit down in a corner and does the same as they do, joining them in their common female work - to their all complete shock and amazement. No words spoken, but both Luthien's deliberate intrussion and claiming of her place in the human female space and sphere will be understood (females can be territorial too but are usually more tolerant if the intruder can prove her worth. Not opposing such an action - and I am sure none would really dare to oppose it verbally - would mean a silent aknowledgment of Luthien's claim to be a fiancee and as such a semi-part ot this households/clans female workforce - and not a mere guest who stays a stranger). They could then proceed to speak of completely different matters.
Of course you could also have one pluck a (-n already killed) chicken - but this is risky nowadays due to the growing resitance to having animals portrayed as a food source in modern movies.
Embroidery, sprang, naabinding and tablet-weaving would be more tasks for the younger women to be done either in the winter when there is a big fire in the house or outside in the sunlight.
Knitting and crochet are far too modern - knitting arrived in Europe via the Arabs from the East and South in late Middle Ages and crochet itself is a relatively modern thing.
They could be also preparing some ornaments for the Misummer festival though - the one they will not attend because of the wedding - but they do not know that yet.