Not gonna help her anymore, she passed away last June; 6 months after being given the diagnose and a 6 month life expectancy.
I also have to say there was never a need for CBD; she only underwent one chemo treatment before we decided it wasnt worth it (side effects where to severe on her intestines which where affected by the cancer too) , but she was never in pain, the morphine patches worked just fine and 5 of her last 6 month where still worth living and even the last month was pain free.
Thats not to say CBD cant be of use for other cancer patients, Im sure it can be very helpful for some. For those, based on what I read since posting this thread, the way to go is not e-liquids, but devices that vaporize cannabis directly, like these:
https://quitsmokingcommunity.org/vaporizers/top-portable-vaporizersthen use medical grade pot.