She died for £60 worth of cocaine
“(She) could have quit anytime”
Typically, addicts aren’t able to reason along those lines.
My first thought upon reading the story is that she inadvertently carried the coke with her, then made a snap decision to swallow it because there was no where else to dump it.
But that can't be true. If you want to lose a few grams of something, even in an airport waiting room, it's not that hard to do. There are certainly garbage bins about. So you're seen on camera dropping something in a waste bin, they can't pin it to you without the effort of a fingerprint check, which I doubt they'd do for a personal-use amount.
She must have thought she could recover it at the other end, so to speak, and decided to roll the dice.
It's hard for me to visualize how one could forget that one was carrying drugs, unless you are surrounded by them all the time.
How do you die from $60 of cocaine? That's a minuscule amount.
One reason why cocaine overdoses aren't that common is because the amount of cocaine you need to overdose is cost-prohibitive.