OP I feel your pain.
I don't knit but I do sew a bit. I like to make things but at my own pace and as the mood takes me.
Sometimes I feel like I want to make a particular thing for a particular person, and I do it. I don't like to make the same thing over and over, or to order.
A few people have said I should sell the things I make but I don't want to. For various reasons which include not wanting to make things to order, the things I make taking a long time, and people thinking handmade equates to cheap.
One particular person has pushed and pushed me to make her something. She started by saying "Oh you should sell these" and me replying "I don't think it would be worth it, it would take me too long to make and people don't want to pay for the time it would take me."
Then she changed to "If you sold these I would buy one" and me repeating the same thing.
I also had a suspicion that she would want this thing making at bargain basement prices but with the best materials, and that she would baulk at paying anything near even the cost of the materials, let alone for my time. So I know I said to her, more than once, it wouldn't be worth making them to sell as people don't want to pay for the time it takes to make them. People think handmade means cheap and it's not true.
Then she asked outright if I would make something and I refused as I am also studying at the moment and the thing she wanted takes a long time. It's at least fourteen hours of work, and I have so many other things to do. It would have either meant entirely focusing on what she wanted through every bit of free time I had.
She left it a bit and asked again. I had a bit more spare time but also I thought of a new design I could try. I was reluctant because I still had reservations about selling things and in particular selling to her, but I agreed because she kept asking and asking. She wanted something almost two meters long, quite large, very intricate detail on it, and personalised to suit her daughters interests.
I drafted out a design she was happy with and gave her a price. It was as cheap as I could possibly make it (under £30 for both materials and my time, so call it £15 for materials, £15 for my time to make it).
She flat out refused to pay it. She couldn't possibly spend almost £30 on something like that, I'd need to make it cheaper.
I said I couldn't do it for any less. It was £15 just for the materials and £15 more for me to make it meant I was working for £1 per hour as it would take me almost 15 hours to make it.
No, she said, she couldn't pay £30 on just a trinket (2 meters long, customised to suit her family, intricate design, one-off for her, would last for years, but just a trinket).
She asked if I could do it for less than £20. I said no. She said her husband wouldn't like her to pay any more than £20 to buy it. I said that my husband wouldn't like me to earn 33p an hour to make it.
She asked me to use less materials, or cheaper materials. I told her to buy her own materials and pay me £20 to put them together.
She refused and said she'd make her own thing. I never made her the thing, she never made one for herself (because it's not that easy). She's never asked for anything else, she's never commented on anything else I've made.
I think it's good your cousin has shown herself up today, don't make her the cardigan.
It's not a way to big you up, she's ignored you and everything you've said to her, and she's potentially blown any chance of you making anything for her in the future when you do have time and feel inspired.