Every day since Sunday - her actual birthday; she's woken up & chosen to go on a bender. Experienced pot users may not find her consumption totals that impressive but judging by her reactions & behavior, I think she has about as much experience with pot as she does with sex.
She's pulling typical rookie moves: "If x feels good than x + 1 will feel GREAT! You'd think several evenings of pot use would have shown her differently & for most of us, that would be the case but Chantal constantly repeats the same mistakes & if anything, doubles down on them.
She's got a bigger problem - she's no longer able to eat to feel good, she's eating to not feel bad. There's a significant difference & while she may be able to eat enough to go from depressed to flat, food isn't doing it for her any more; not the way it used to. For now, she's sort of coping with the lack of a food high with pot & clearly thinks some fictitious sex god is out there who'll make everything all better.
At her age, size & way of life, she's damned near out of options for life, never mind contentment, fulfillment or happiness. She's barely staving off panic now with the pot. Her house of cards is dissolving before her eyes & she's incapable of, unwilling to, find the courage to face any kind of reality.
Buckle up - the ride is just going to get rougher.