Here's an idea. You figure out what kind of pv to get her, ego, ego passthrough, riva, etc...
I would be happy to pif a couple syringe tank mods and send them to you with a couple of punched ressurector cartos. These caros run at around 1.7ohms, so she'll get a good vape on a lower voltage pv. These tanks hold around 5ml of e juice. They DO NOT leak. She can lay them down, whatever, they just don't leak. You will need to fill them for her with a syringe. I will also send you a syringe. You will need to watch this video to see how they work and how to refill them; http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/220756-homemade-syringe-tank-mod-looks-easy.html Just pm me if you decide to go this route.
Kudos to you for helping your mom. I also caretake fulltime for my 82 yr. old mom, who lives with us, and part-time for my in-laws, one of whom has very bad Alzheimer's. Smoking has never been one of their issues, but we all have to go that extra mile to take care of our parents; they took care of us for a long time.
Wow my4jewels that is incredibly kind of you. Never ceases to amaze me the generosity of people like you on this community. But to be honest I'm not all that hard up for money. So I would feel bad taking something like this from you when there are others that are struggling on a much smaller vaping budget.