She's playing with fire, with those hard drugs. Spends 5 nights a week, away from home...and has wracked up over 20k in cc debt, never mind what else you've, yourself and your kids have lost, to all of this.
Because of this, no judge, knowingly, with knowledge of this would allow anything, but supervised visitation, at her expense.
Maybe, she does love her kids, and your memories of her before overshadow the reality, that is today. With all this, you could speak to a priest, about an annulment, as well. A full Tribunal study is $400. Without study, say like my case, not married in church and couldn't find exes baptismal records, it's $50. So, $450. Mine took one week. Some can take longer.
It's clear, she's not upholding vows.

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