Smoking again

I've finally had my first failure with smoking cessation. I thought it would have happened before now - given that I'm only just starting out (and from what I've read & been told, doing it for free has a higher chance of not working as well). My friends mother, that I helped with some pain control recently, has started smoking again after having a couple of smoking cessation sessions. I've offered to do a follow up to deal with the parts she found difficult (and maybe try some aversion therapy as well). Hopefully, if she does decide to give it a go it'll be more successful this time.