Yes. In that case, one of the benefits is likely to be that this is a legal means to supplement her income whereas actually "working" for pay may jeopardize you

Yes. In that case, one of the benefits is likely to be that this is a legal means to supplement her income whereas actually "working" for pay may jeopardize your disability income. Being disabled sucks for so many reasons and rules that actively make it unnecessarily hard to make your life suck less is one of the suckiest things about it.