I'm going off of observed behavior.
- I've been playing uke for about 10 years and in that time I've invited her many times to learn to play with me and how fun it would be and that I'd be happy to teach her. It was always, "Thanks but no thanks!" She didn't even try it out to humor me. If I ever saw a hint of interest, I would have jumped at the opportunity.
- About 2 years ago her favorite local radio personality said he was starting up a uke gathering and was holding it at the radio station. It wasn't until the lure of meeting him and seeing the radio station was offered that she showed any interest in playing the ukulele. She feeds off of and is energized being around people (I'm the exact opposite) so she thought it would be a fun opportunity and the ukulele (+my experience, presence and support) was her ticket in.
- The aforementioned group met monthly, some of which were cancelled so that is fewer than 24 meetings in 2 years. In that time, not once did I ever see or hear her pick up the uke other than to play at the meeting itself or for a short practice session before a meeting when we were sponsoring a song or songs. She has a lot of fun being in the gathering and playing at the meeting but has never played for fun or pleasure outside of group meeting days. If there wasn't a meeting for 3 months she wouldn't play at all in those 3 months. While the whole experience is something she enjoys, the social aspect is primary and the ukulele is secondary.
- I don't think a nicer uke would change that behavior. The Ohana SK-30M is an all-solid mahogany and it's a nice little uke. I would confidently hand it to an experienced player and I wouldn't feel awkward like it wasn't enough uke for them. If anything, she had the benefit of learning on a nice uke rather than a frustrating piece of junk.
A lot of people, me included, often think that if we are passionate about something, that others will share that passion if only they could be exposed to it or try it out. Unfortunately, sharing my passion didn't catch on at all with my daughters and only kinda-sorta caught on with my wife!