because crack is one of the most powerfully addictive drugs around. because the addiction is far more mental than it is physical. because crack use rewires the brain and pleasure centers so that the ONLY thing that makes a dent is more crack. because the high is intense but short lived and it's all about MORE. because crack makes you care about only ONE thing......MORE. not health, finances, spouses, children, jobs or even if the house you are sitting in smoking is on fire. not if there's still dope on the plate....
sad to say, but i'd dust off those divorce papers and proceed. he may have been able to SAY nice things to you while in JAIL, but his ACTIONS tell a far different story. the REAL ONE.
really really sorry. your kids deserve better from a father. and you deserve better from a husband than to say the best part of your marriage was when he was locked up.