This is the right question. We just can speculate as long as op didn't answer.
Maybe the couple saved a bit of cash and invested that in BTC. Although that would be dumb without having a job and that being all the money they had so far.
I'm also scratching my head how this should work. Earning Bitcoin without a decent job where a company pays you in BTC isn't easy to find, mostly impossible.
Maybe she is doing "cam job" for BTC?!
Bro, I noticed you from you are been in lucky btc campaign bro. You may noticed many people like jacee, darkstar and jamal aejaz are doing the same campaign once and making money out of it. But now they are reputable position in the forum and making money as a manager, some of the people explore more and learn bitcoin related project knowledge and making more money than day job. Then even you can also do that I hope bro.
All that is making money from marketing, no bitcoins. You could earn enough just by teaching people how to use it, learn how to integrate to a payment system, etc. Etc.