Jacob, yes.....that should work fine. I have some almost exactly like that. I'd suggest boiling it for 15 minutes or so (I boil mine then dry it in the clothes dryer.) I use two strands (I just fold it, wrap the coil, install it then trim it) and it works very well. I also got some 100% cotton embroidery thread from Michaels that works (IMHO) as well or better. Send your fiance to the sewing store.
EDIT: I got some Bamboo but I haven't tried it yet so I can't answer that. But I have several different types of cotton (yarn, crochet thread, embroidery thread) that are doing it for me. Next time I change my wick, I may try the Bamboo. What I've learned from getting a bunch of different 100% cotton types of materials is that you can use almost anything that's 100% cotton (organic is even better in my book) and make a good wick with it. I'd avoid dyes (get natural) but other than that, it's all good. I do boil everything first....just because.
When you make a new wick with cotton, it'll have a "taste" for just the first few vapes....just vape through it. I actually don't inhale for maybe 6-8 vapes. The taste goes away quickly then they're great wicks. Love 'em.
Jan